Vulnerability in Openbsd Openssh
CVE-2023-51767
OpenSSH through 10.0, when common types of DRAM are used, might allow row hammer attacks (for authentication bypass) because the integer value of authenticated in mm_answer_authpassword does not resist flips of a single bit. NOTE: this is applicable to a certain threat model of attacker-victim co-location in which the attacker has user privileges. NOTE: this is disputed by the Supplier, who states "we do not consider it to be the application's responsibility to defend against platform architectural weaknesses."
EPSS: 0.007 (47.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Openbsd Openssh
- Fedoraproject Fedora — versions 39
- Redhat Enterprise_linux — versions 8.0, 9.0
- N/a — versions n/a
Public proof-of-concept exploits
References
- cve@mitre.org (Technical Description)
- cve@mitre.org (Product)
- cve@mitre.org (Product)
- cve@mitre.org (Third Party Advisory, Issue Tracking)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-51767?
- CVE-2023-51767 is a high-severity vulnerability in Openbsd Openssh. CVSS score: 7.0/10. Published 2023-12-24.
- How severe is CVE-2023-51767?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2023-51767 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.