CVE-2023-1667: debian debian_linux NULL Pointer Dereference
CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2023-1667DEBIAN-CVE-2023-1667
Published 26-05-2023Last modified 02-08-2024
Vulnerability summary
CVE-2023-1667 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 1.31% chance of exploitation in the next 30 days, higher than 70.2% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
1.31%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 11 · Related 5Timeline
- 26-05-2023PublishedVulnerability first disclosed.
- 02-08-2024Last modifiedVulnerability information updated.
Description
A NULL pointer dereference was found In libssh during re-keying with algorithm guessing. This issue may allow an authenticated client to cause a denial of service.
CVSS metrics
3 scores · 3 sources · 1 versionMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 3 agree
- 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
EPSS trend
Probability
1.31%
Chance of exploitation in the next 30 days
Percentile
70%
Versus all other CVEs
30-day change
0.00 pp
From 1.31% on 18-09-2026
18-09-202618-10-2026
EPSS score1.31%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- libssh< 0.10.5-1
- debian_linuxEOL10.0
Fedoraproject1 product
- fedoraEOL37
Libssh1 product
- libssh≥ 0.9.1, ≤ 0.9.6 | ≥ 0.10.0, ≤ 0.10.4
Redhat1 product
- enterprise_linux8.0 | 9.0
Ubuntu1 product
- libsshAll versions (No fix recorded) | < 0.9.3-2ubuntu2.3 | < 0.9.6-2ubuntu0.22.04.1
5 vendors · 6 products
References
11 links- access.redhat.com/security/cve/CVE-2023-1667Third Party Advisory
- www.libssh.org/security/advisories/CVE-2023-1667.txtVendor Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
- security.gentoo.org/glsa/202312-05Vendor Advisory