CVE-2023-51767 Affecting openssh package, versions *
Snyk CVSS
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Test your applications- Snyk ID SNYK-UBUNTU2204-OPENSSH-6142085
- published 3 Jan 2024
- disclosed 24 Dec 2023
Introduced: 24 Dec 2023
CVE-2023-51767 Open this link in a new tabHow to fix?
There is no fixed version for Ubuntu:22.04 openssh.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssh package and not the openssh package as distributed by Ubuntu.
See How to fix? for Ubuntu:22.04 relevant fixed versions and status.
OpenSSH through 9.6, 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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2023-51767
- https://arxiv.org/abs/2309.02545
- https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77
- https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878
- https://access.redhat.com/security/cve/CVE-2023-51767
- https://bugzilla.redhat.com/show_bug.cgi?id=2255850
- https://ubuntu.com/security/CVE-2023-51767
- https://security.netapp.com/advisory/ntap-20240125-0006/