Vulnerability · Published Feb 21, 2023 · Assigned by mitre
CVE-2023-23009
Medium 6.5
In plain English
A medium-severity uncontrolled resource consumption in the libreswan package (AlmaLinux). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 76% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)1.6%top 24.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | libreswan | 4.9-2.el8_8.2 | ALSA-2023:3095 |
| AlmaLinux:9 | libreswan | 4.9-2.el9_2 | ALSA-2023:2633 |
| Debian:12 | libreswan | 4.9-2 | DEBIAN-CVE-2023-23009 |
| Debian:13 | libreswan | 4.9-2 | DEBIAN-CVE-2023-23009 |
| Ubuntu:22.04:LTS | libreswan | no fix listed | UBUNTU-CVE-2023-23009 |
| Ubuntu:24.04:LTS | libreswan | no fix listed | UBUNTU-CVE-2023-23009 |
| Ubuntu:25.10 | libreswan | no fix listed | UBUNTU-CVE-2023-23009 |
| Ubuntu:26.04:LTS | libreswan | no fix listed | UBUNTU-CVE-2023-23009 |
| Ubuntu:26.10 | libreswan | no fix listed | UBUNTU-CVE-2023-23009 |
Affected products (as reported)
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/libreswan/libreswan/issues/954
- DSA-5368 vendor-advisory
- FEDORA-2023-a2348480cb vendor-advisory
- FEDORA-2023-42ec148952 vendor-advisory