OPENSUSE-SU-2026:21320-1
Vulnerability from csaf_opensuse - Published: 2026-07-13 13:54 - Updated: 2026-07-13 13:54Summary
Security update for pam
Severity
Moderate
Notes
Title of the patch: Security update for pam
Description of the patch: This update for pam fixes the following issue
- CVE-2026-54411: timing discrepancy in the `pam_userdb` module's plaintext-password comparison (bsc#1268290).
Patchnames: openSUSE-Leap-16.0-1224
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
5.9 (Medium)
Affected products
Recommended
18 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: openSUSE Leap 16.0:pam-1.7.1-160000.5.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-1.7.1-160000.5.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-1.7.1-160000.5.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-1.7.1-160000.5.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-devel-1.7.1-160000.5.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-devel-1.7.1-160000.5.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-devel-1.7.1-160000.5.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-devel-1.7.1-160000.5.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-doc-1.7.1-160000.5.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-extra-1.7.1-160000.5.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-extra-1.7.1-160000.5.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-extra-1.7.1-160000.5.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-extra-1.7.1-160000.5.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-manpages-1.7.1-160000.5.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-userdb-1.7.1-160000.5.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-userdb-1.7.1-160000.5.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-userdb-1.7.1-160000.5.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Leap 16.0:pam-userdb-1.7.1-160000.5.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
moderate
References
6 references
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"text": "Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pam_userdb module\u0027s plaintext-password comparison path in modules/pam_userdb/pam_userdb.c that allows a local or network-adjacent attacker able to repeatedly drive authentication through a calling service to recover the plaintext password of a target account by measuring response-timing differences. The comparison uses strncmp() (or strncasecmp() when PAM_ICASE_ARG is set) preceded by a length-equality check, so the time to reject a candidate depends on the index of the first differing byte and on whether the candidate\u0027s length matches the stored password, leaking the password length and individual prefix bytes. The vulnerable path is reached when the administrator configures pam_userdb with crypt=none, with an unrecognized crypt method, or without a crypt= argument, causing the module to store and compare credentials in plaintext.",
"title": "CVE description"
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"title": "CVE-2026-54411"
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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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