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CVE-2023-51767

Date: December 24, 2023

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.

Language: C

Severity Score

Related Resources (9)

https://security.netapp.com/advisory/ntap-20240125-0006/
https://nvd.nist.gov/vuln/detail/CVE-2023-51767
https://bugzilla.redhat.com/show_bug.cgi?id=2255850
https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878
https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77
https://ubuntu.com/security/CVE-2023-51767
https://arxiv.org/abs/2309.02545
https://access.redhat.com/security/cve/CVE-2023-51767
https://www.mend.io/vulnerability-database/CVE-2023-51767

Severity Score

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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