RHSA-2026:43575
Vulnerability from csaf_redhat - Published: 2026-07-22 14:42 - Updated: 2026-07-22 20:44Summary
Red Hat Security Advisory: gnutls security update
Severity
Moderate
Notes
Topic: An update for gnutls is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.
Security Fix(es):
* gnutls: GnuTLS: Policy bypass due to case-sensitive nameConstraints comparison (CVE-2026-3833)
* gnutls: gnutls: Security bypass due to incorrect name constraint handling (CVE-2026-42011)
* gnutls: gnutls: Certificate validation bypass due to improper handling of URI and SRV SANs (CVE-2026-42012)
* gnutls: gnutls: Certificate validation bypass due to oversized Subject Alternative Name (CVE-2026-42013)
* gnutls: Fix use-after-free in gnutls_pkcs11_token_set_pin (CVE-2026-42014)
* gnutls: gnutls: Memory corruption due to off-by-one error in PKCS#12 bag handling (CVE-2026-42015)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in gnutls. This vulnerability occurs because gnutls performs case-sensitive comparisons of `nameConstraints` labels, specifically for `dNSName` (DNS) or `rfc822Name` (email) constraints within `excludedSubtrees` or `permittedSubtrees`. A remote attacker can exploit this by crafting a leaf certificate with casing differences in the Subject Alternative Name (SAN), leading to a policy bypass where a certificate that should be rejected is instead accepted. This could result in unauthorized access or information disclosure.
6.5 (Medium)
Affected products
Fixed
33 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.i686 | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc | — |
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64le | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390 | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390x | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.src | — |
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.i686 | — |
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.i686 | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.i686 | — |
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc | — |
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.x86_64 | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64le | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.s390x | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
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Known not affected
7 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.i686 | — |
Workaround
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| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc | — |
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| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64 | — |
Workaround
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| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64le | — |
Workaround
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| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.x86_64 | — |
Workaround
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Threats
Impact
Moderate
A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.
7.4 (High)
Affected products
Fixed
33 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.src | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.i686 | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.s390x | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.x86_64 | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64 | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390x | — |
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fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
Known not affected
7 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.i686 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64le | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390x | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.x86_64 | — |
Threats
Impact
Moderate
A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.
7.1 (High)
Affected products
Fixed
33 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.src | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.i686 | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
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Known not affected
7 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.i686 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64le | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390x | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.x86_64 | — |
Threats
Impact
Moderate
A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name (SAN) could cause the validation process to incorrectly fall back to checking the Common Name (CN) field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to spoofing or man-in-the-middle attacks.
8.2 (High)
Affected products
Fixed
33 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
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| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
Known not affected
7 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.i686 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64le | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390x | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.x86_64 | — |
Threats
Impact
Moderate
A flaw was found in GnuTLS. The `gnutls_pkcs11_token_set_pin` function, used for changing the Security Officer PIN, can lead to a use-after-free vulnerability. This occurs when an attacker attempts to change the PIN with a NULL old PIN for a token that lacks a protected authentication path.
6.6 (Medium)
Affected products
Fixed
33 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
Known not affected
7 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.i686 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64le | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390x | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.x86_64 | — |
Threats
Impact
Moderate
A flaw was found in gnutls. An off-by-one error exists in the PKCS#12 bag element bounds check. This vulnerability allows an remote attacker to write past the internal array of a PKCS#12 bag when appending to a bag that already contains 32 elements. This memory corruption could lead to a denial of service (DoS) or potentially other unspecified impacts.
5.3 (Medium)
Affected products
Fixed
33 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.x86_64 | — |
Vendor Fix
fix
|
Known not affected
7 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.i686 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64le | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390 | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390x | — | ||
| Unresolved product id: 7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.x86_64 | — |
Threats
Impact
Moderate
References
40 references
Acknowledgments
Stella
Haruto Kimura
1Seal
Oleh Konko
AISLE Research Team
Joshua Rogers
Luigino Camastra
Zou Dikai
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{
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"text": "An update for gnutls is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.\n\nRed Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
"title": "Topic"
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{
"category": "general",
"text": "The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.\n\nSecurity Fix(es):\n\n* gnutls: GnuTLS: Policy bypass due to case-sensitive nameConstraints comparison (CVE-2026-3833)\n\n* gnutls: gnutls: Security bypass due to incorrect name constraint handling (CVE-2026-42011)\n\n* gnutls: gnutls: Certificate validation bypass due to improper handling of URI and SRV SANs (CVE-2026-42012)\n\n* gnutls: gnutls: Certificate validation bypass due to oversized Subject Alternative Name (CVE-2026-42013)\n\n* gnutls: Fix use-after-free in gnutls_pkcs11_token_set_pin (CVE-2026-42014)\n\n* gnutls: gnutls: Memory corruption due to off-by-one error in PKCS#12 bag handling (CVE-2026-42015)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
"title": "Details"
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"text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
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"category": "description",
"text": "A flaw was found in gnutls. This vulnerability occurs because gnutls performs case-sensitive comparisons of `nameConstraints` labels, specifically for `dNSName` (DNS) or `rfc822Name` (email) constraints within `excludedSubtrees` or `permittedSubtrees`. A remote attacker can exploit this by crafting a leaf certificate with casing differences in the Subject Alternative Name (SAN), leading to a policy bypass where a certificate that should be rejected is instead accepted. This could result in unauthorized access or information disclosure.",
"title": "Vulnerability description"
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{
"category": "summary",
"text": "gnutls: GnuTLS: Policy bypass due to case-sensitive nameConstraints comparison",
"title": "Vulnerability summary"
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{
"category": "other",
"text": "This issue is particularly important because it affects the correct enforcement of X.509 nameConstraints, which are specifically designed to limit the authority of subordinate CAs. In GnuTLS, the use of case-sensitive comparisons (memcmp) for dNSName and the domain portion of rfc822Name violates the case-insensitive matching requirements defined in RFC 5280 and RFC 4343. As a result, a constrained subordinate CA can bypass excludedSubtrees or permittedSubtrees restrictions simply by changing the letter casing of a domain in the SAN (e.g., ExAmPlE.CoM vs example.com). Since nameConstraints are often the only mechanism enforcing domain boundaries in delegated PKI hierarchies, this flaw effectively allows a malicious or compromised sub-CA to issue certificates for domains that should be cryptographically prohibited, enabling unauthorized certificate validation and potential TLS impersonation of restricted services.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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{
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"title": "gnutls: GnuTLS: Policy bypass due to case-sensitive nameConstraints comparison"
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{
"acknowledgments": [
{
"names": [
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"organization": "Stella"
}
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"name": "Improper Certificate Validation"
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"ids": [
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"notes": [
{
"category": "description",
"text": "A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "gnutls: gnutls: Security bypass due to incorrect name constraint handling",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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{
"category": "general",
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"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"products": [
"7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.i686",
"7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc",
"7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64",
"7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.ppc64le",
"7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390",
"7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.s390x",
"7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.src",
"7Server-ELS:gnutls-0:3.3.29-9.el7_9.2.x86_64",
"7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.i686",
"7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc",
"7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64",
"7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.ppc64le",
"7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390",
"7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.s390x",
"7Server-ELS:gnutls-c++-0:3.3.29-9.el7_9.2.x86_64",
"7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.i686",
"7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc",
"7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64",
"7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.ppc64le",
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"7Server-ELS:gnutls-dane-0:3.3.29-9.el7_9.2.x86_64",
"7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.i686",
"7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc",
"7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64",
"7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.ppc64le",
"7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390",
"7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.s390x",
"7Server-ELS:gnutls-debuginfo-0:3.3.29-9.el7_9.2.x86_64",
"7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.i686",
"7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc",
"7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64",
"7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.ppc64le",
"7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390",
"7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.s390x",
"7Server-ELS:gnutls-devel-0:3.3.29-9.el7_9.2.x86_64",
"7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64",
"7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.ppc64le",
"7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.s390x",
"7Server-ELS:gnutls-utils-0:3.3.29-9.el7_9.2.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "gnutls: gnutls: Memory corruption due to off-by-one error in PKCS#12 bag handling"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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