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CVE-2023-23009

MEDIUM
6.5
CVSS Score
Published: February 21, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 05:36 AM UTC
2 products affected across 2 vendorsDebian LinuxLibreswan

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Severity
MEDIUM6.5
Exploit prediction
EPSS 2%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

References (4)

ExploitIssue TrackingPatch
Source: [email protected]
https://github.com/libreswan/libreswan/issues/954
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2MFOIQX2LRL43P3GJT33DE7G7COHNXDN/
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CSMYJH7MC2FZGCY5NH5AXULO3ISXIHOF/
Vendor AdvisoryThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2023/dsa-5368

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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