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OpenAdvisories
High · 7.0 CVE-2023-51767 EUVD-2023-56456GHSA-27q9-h529-q4g3

OpenSSH through 10.0, when common types of DRAM are used, might allow row hammer attacks (for authentication bypass) because the integer va…

Published Dec 24, 2023 · Updated Oct 15, 2026 · Assigned by mitre

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."

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Alpine v3.24 openssh 9.7_p1-r0 —
Alpine v3.23 openssh 9.7_p1-r0 —
Alpine v3.22 openssh 9.7_p1-r0 —
Alpine v3.21 openssh 9.7_p1-r0 —
Alpine v3.20 openssh 9.7_p1-r0 —
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Alpine v3.19 openssh 9.7_p1-r0 —

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling openssh 9.6_p1-r0 —

Advisories 5

References