CVE-2023-51767

HIGH

OpenSSH through 10.0 - Authentication Bypass via Row Hammer Bit Flip

Title source: llm
STIX 2.1

Description

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."

References (34)

Core 34
Core References
Technical Description
https://arxiv.org/abs/2309.02545
Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2255850

Scores

CVSS v3 7.0
EPSS 0.0066
EPSS Percentile 46.8%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

Status published
Products (4)
fedoraproject/fedora 39
openbsd/openssh
redhat/enterprise_linux 8.0
redhat/enterprise_linux 9.0
Published Dec 24, 2023
Tracked Since Feb 18, 2026