CVE-2023-51767 Information

Description

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.

Reference

https://arxiv.org/abs/2309.02545 https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878 https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77 https://bugzilla.redhat.com/show_bug.cgi?id=2255850 https://access.redhat.com/security/cve/CVE-2023-51767