What’s Vulnerable › Vulnerabilities

CVE-2023-23009

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-02-21 · updated 2026-06-17
• Weakness: CWE-400

Description

Libreswan 4.9 allows remote attackers to cause a denial of service (assert failure and daemon restart) via crafted TS payload with an incorrect selector length.

Affected products

• Debian Linux: 11.0
• The Libreswan Project libreswan: 4.9

References

• https://github.com/libreswan/libreswan/issues/954
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2MFOIQX2LRL43P3GJT33DE7G7COHNXDN/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CSMYJH7MC2FZGCY5NH5AXULO3ISXIHOF/
• https://www.debian.org/security/2023/dsa-5368
• https://github.com/libreswan/libreswan/issues/954
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2MFOIQX2LRL43P3GJT33DE7G7COHNXDN/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CSMYJH7MC2FZGCY5NH5AXULO3ISXIHOF/
• https://www.debian.org/security/2023/dsa-5368

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