Vulnerability-Lookup

OPENSUSE-SU-2026:11500-1

Vulnerability from csaf_opensuse - Published: 2026-08-11 00:00 - Updated: 2026-09-17 17:19

Summary

stunnel-5.80-1.1 on GA media

Severity

Moderate

Notes

Title of the patch: stunnel-5.80-1.1 on GA media

Description of the patch: These are all security issues fixed in the stunnel-5.80-1.1 package on the GA media of openSUSE Tumbleweed.

Patchnames: openSUSE-Tumbleweed-2026-11500

CVE-2026-70367

5.4 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected products

Recommended 8 products

Product	Version	Remediation
Unresolved product id: openSUSE Tumbleweed:stunnel-0:5.80-1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:stunnel-0:5.80-1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:stunnel-0:5.80-1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:stunnel-0:5.80-1.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:stunnel-doc-0:5.80-1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:stunnel-doc-0:5.80-1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:stunnel-doc-0:5.80-1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:stunnel-doc-0:5.80-1.1.x86_64	—	Vendor Fix

Threats

Impact moderate

CVE-2026-70368

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Affected products

Recommended 8 products, the same list as for CVE-2026-70367

Threats

Impact moderate

References

8 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://www.suse.com/security/cve/CVE-2026-70367/	self
https://www.suse.com/security/cve/CVE-2026-70368/	self
https://www.suse.com/security/cve/CVE-2026-70367	external
https://bugzilla.suse.com/1274207	external
https://www.suse.com/security/cve/CVE-2026-70368	external
https://bugzilla.suse.com/1274206	external

JSON

To clipboard

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          "text": "A Server-Side Request Forgery (SSRF) bypass vulnerability exists in \"stunnel\" 5.79 and lower when configured in SOCKS proxy mode. This flaw allows a client to bypass intended localhost restrictions by using IPv4-mapped IPv6 addresses (e.g., \"::ffff:127.0.0.1\") or unspecified addresses (\"0.0.0.0\", \"::\"), enabling access to loopback-only services on the \"stunnel\" host that should not be network-reachable.",
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        {
          "category": "general",
          "text": "A stack-based out-of-bounds read vulnerability exists in the \"s_vlog\" function of stunnel, when handling oversized log messages via \"vsnprintf\". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an out-of-bounds stack read and a potential crash. In certain corner cases, the same vulnerability could be used to replace a series of trailing \"\\n\" characters with \"\\0\".",
          "title": "CVE description"
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        }
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            "openSUSE Tumbleweed:stunnel-doc-0:5.80-1.1.x86_64"
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            "openSUSE Tumbleweed:stunnel-0:5.80-1.1.x86_64",
            "openSUSE Tumbleweed:stunnel-doc-0:5.80-1.1.aarch64",
            "openSUSE Tumbleweed:stunnel-doc-0:5.80-1.1.ppc64le",
            "openSUSE Tumbleweed:stunnel-doc-0:5.80-1.1.s390x",
            "openSUSE Tumbleweed:stunnel-doc-0:5.80-1.1.x86_64"
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-11T00:00:00Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-70368"
    }
  ]
}

CVE-2026-70367 (GCVE-0-2026-70367)

Vulnerability from cvelistv5 – Published: 2026-08-04 13:52 – Updated: 2026-08-06 07:28

Title

Stunnel: ssrf bypass in stunnel socks proxy via ipv4-mapped ipv6 loopback and unspecified addresses allows access to loopback-only services

Summary

A Server-Side Request Forgery (SSRF) bypass vulnerability exists in “stunnel” 5.79 and lower when configured in SOCKS proxy mode. This flaw allows a client to bypass intended localhost restrictions by using IPv4-mapped IPv6 addresses (e.g., “::ffff:127.0.0.1”) or unspecified addresses ("0.0.0.0", "::"), enabling access to loopback-only services on the "stunnel" host that should not be network-reachable.

Severity

5.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-04 14:50 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

redhat redhat root Scorecard

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-70367	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2462083	issue-trackingx_refsource_REDHAT

Impacted products

6 products

Vendor	Product	Version
Mobi-Com Polska Sp. z o.o.	stunnel	Affected: 5.25 , < 5.80 (custom)
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public

2026-08-04 10:29

Credits

This issue was discovered by Found by AISLE in partnership with Red Hat.

Show details on NVD website

JSON

To clipboard

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CVE-2026-70368 (GCVE-0-2026-70368)

Vulnerability from cvelistv5 – Published: 2026-08-04 13:52 – Updated: 2026-08-06 07:33

Title

Stunnel: stack-based out-of-bounds read/write in stunnel s_vlog via oversized log message

Summary

A stack-based out-of-bounds read vulnerability exists in the "s_vlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an out-of-bounds stack read and a potential crash. In certain corner cases, the same vulnerability could be used to replace a series of trailing "\n" characters with "\0".

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-04 14:21 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

redhat redhat root Scorecard

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-70368	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2462029	issue-trackingx_refsource_REDHAT

Impacted products

6 products

Vendor	Product	Version
Mobi-Com Polska Sp. z o.o.	stunnel	Affected: 5.68 , < 5.80 (custom)
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public

2026-08-04 10:30

Credits

This issue was discovered by Found by AISLE in partnership with Red Hat.

Show details on NVD website

JSON

To clipboard

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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.

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OPENSUSE-SU-2026:11500-1

CVE-2026-70367 (GCVE-0-2026-70367)

CVE-2026-70368 (GCVE-0-2026-70368)

Tags

Sightings

Nomenclature

Related by attack behaviour