CVE-2023-23009: debian debian_linux Uncontrolled Resource Consumption
Vulnerability summary
CVE-2023-23009 is a medium (CVSS 6.5) Uncontrolled Resource Consumption vulnerability in debian debian_linux. EPSS estimates a 1.61% chance of exploitation in the next 30 days, higher than 75.9% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 4Timeline
- 21-02-2023PublishedVulnerability first disclosed.
- 17-03-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
6 scores · 6 sources · 1 version- OSV · Red hatEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.61%
Chance of exploitation in the next 30 days
Percentile
76%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.61% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundLibreswan
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat3 products
- libreswan< 0:4.9-2.el9_2 | < 0:4.9-2.el8_8.2
- libreswan-debuginfo< 0:4.9-2.el9_2 | < 0:4.9-2.el8_8.2
- libreswan-debugsource< 0:4.9-2.el9_2 | < 0:4.9-2.el8_8.2
Debian2 products
- libreswan< 4.3-1+deb11u3 | < 4.9-2
- debian_linuxEOL11.0
Alpine1 product
- libreswan< 4.9-r1
Libreswan1 product
- libreswan4.9
Mageia1 product
- libreswan< 4.6-4.1.mga8
Ubuntu1 product
- libreswanAll versions (No fix recorded)
6 vendors · 9 products
References
20 links
- lists.fedoraproject.org/archives/…Vendor Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
