Vulnerability · Published May 26, 2023 · Assigned by redhat
CVE-2023-1667
Medium 6.5
In plain English
A medium-severity null pointer dereference in libssh. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)1.3%top 29.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | libssh | 0.9.6-10.el8_8 | ALSA-2023:3839 |
| AlmaLinux:9 | libssh | 0.10.4-11.el9 | ALSA-2023:6643 |
| AlmaLinux:8 | libssh-config | 0.9.6-10.el8_8 | ALSA-2023:3839 |
| AlmaLinux:9 | libssh-config | 0.10.4-11.el9 | ALSA-2023:6643 |
| AlmaLinux:8 | libssh-devel | 0.9.6-10.el8_8 | ALSA-2023:3839 |
| AlmaLinux:9 | libssh-devel | 0.10.4-11.el9 | ALSA-2023:6643 |
| Debian:12 | libssh | 0.10.5-1 | DEBIAN-CVE-2023-1667 |
| Debian:13 | libssh | 0.10.5-1 | DEBIAN-CVE-2023-1667 |
| Debian:14 | libssh | 0.10.5-1 | DEBIAN-CVE-2023-1667 |
| Rocky Linux:8 | libssh | 0:0.9.6-10.el8_8 | RLSA-2023:3839 |
| Ubuntu:22.04:LTS | libssh | 0.9.6-2ubuntu0.22.04.1 | USN-6138-1 |
| Ubuntu:22.04:LTS | libssh | 0.9.6-2ubuntu0.22.04.1 | UBUNTU-CVE-2023-1667 |
Affected products (as reported)
Weakness: CWE-476
References
- https://access.redhat.com/security/cve/CVE-2023-1667
- https://bugzilla.redhat.com/show_bug.cgi?id=2182199
- http://www.libssh.org/security/advisories/CVE-2023-1667.txt
- FEDORA-2023-5fa5ca2043 vendor-advisory
- [debian-lts-announce] 20230529 [SECURITY] [DLA 3437-1] libssh security update mailing-list
- GLSA-202312-05 vendor-advisory