Improper Authentication Affecting openssh package, versions <0:10.3p1-2.hum1


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.01% (1st percentile)

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  • Snyk IDSNYK-RHEL10-OPENSSH-16079131
  • published16 Apr 2026
  • disclosed24 Dec 2023

Introduced: 24 Dec 2023

CVE-2023-51767  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade RHEL:10 openssh to version 0:10.3p1-2.hum1 or higher.
This issue was patched in RHSA-2026:9221.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh package and not the openssh package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

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

CVSS Base Scores

version 3.1