Vulnerability Details CVE-2023-51767
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."
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 0.2%
CVSS Severity
CVSS v3 Score 7.0
References
- https://access.redhat.com/security/cve/CVE-2023-51767
- https://arxiv.org/abs/2309.02545
- https://bugzilla.redhat.com/show_bug.cgi?id=2255850
- https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77
- https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878
- https://security.netapp.com/advisory/ntap-20240125-0006/
- https://ubuntu.com/security/CVE-2023-51767
- https://www.openwall.com/lists/oss-security/2025/09/22/1
- https://access.redhat.com/security/cve/CVE-2023-51767
- https://arxiv.org/abs/2309.02545
- https://bugzilla.redhat.com/show_bug.cgi?id=2255850
- https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77
- https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878
- https://security.netapp.com/advisory/ntap-20240125-0006/
- https://ubuntu.com/security/CVE-2023-51767
Products affected by CVE-2023-51767
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cpe:2.3:a:openbsd:openssh:-
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cpe:2.3:a:openbsd:openssh:1.2
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cpe:2.3:a:openbsd:openssh:1.2.1
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cpe:2.3:a:openbsd:openssh:1.2.2
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cpe:2.3:a:openbsd:openssh:1.2.27
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cpe:2.3:a:openbsd:openssh:1.2.3
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cpe:2.3:a:openbsd:openssh:1.3
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cpe:2.3:a:openbsd:openssh:1.5
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cpe:2.3:a:openbsd:openssh:1.5.7
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cpe:2.3:a:openbsd:openssh:1.5.8
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cpe:2.3:a:openbsd:openssh:10.0
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cpe:2.3:a:openbsd:openssh:2
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cpe:2.3:a:openbsd:openssh:2.1
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cpe:2.3:a:openbsd:openssh:2.1.0
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cpe:2.3:a:openbsd:openssh:2.1.1
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cpe:2.3:a:openbsd:openssh:2.2
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cpe:2.3:a:openbsd:openssh:2.2.0
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cpe:2.3:a:openbsd:openssh:2.3
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cpe:2.3:a:openbsd:openssh:2.3.0
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cpe:2.3:a:openbsd:openssh:2.3.1
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cpe:2.3:a:openbsd:openssh:2.5
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cpe:2.3:a:openbsd:openssh:2.5.1
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cpe:2.3:a:openbsd:openssh:2.5.2
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cpe:2.3:a:openbsd:openssh:2.9
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cpe:2.3:a:openbsd:openssh:2.9.9
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cpe:2.3:a:openbsd:openssh:2.9.9p2
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cpe:2.3:a:openbsd:openssh:2.9p1
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cpe:2.3:a:openbsd:openssh:2.9p2
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cpe:2.3:a:openbsd:openssh:3.0
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cpe:2.3:a:openbsd:openssh:3.0.1
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cpe:2.3:a:openbsd:openssh:3.0.1p1
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cpe:2.3:a:openbsd:openssh:3.0.2
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cpe:2.3:a:openbsd:openssh:3.0.2p1
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cpe:2.3:a:openbsd:openssh:3.0p1
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cpe:2.3:a:openbsd:openssh:3.1
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cpe:2.3:a:openbsd:openssh:3.1p1
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cpe:2.3:a:openbsd:openssh:3.2
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cpe:2.3:a:openbsd:openssh:3.2.2
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cpe:2.3:a:openbsd:openssh:3.2.2p1
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cpe:2.3:a:openbsd:openssh:3.2.3
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cpe:2.3:a:openbsd:openssh:3.2.3p1
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cpe:2.3:a:openbsd:openssh:3.3
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cpe:2.3:a:openbsd:openssh:3.3p1
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cpe:2.3:a:openbsd:openssh:3.4
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cpe:2.3:a:openbsd:openssh:3.4p1
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cpe:2.3:a:openbsd:openssh:3.5
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cpe:2.3:a:openbsd:openssh:3.5p1
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cpe:2.3:a:openbsd:openssh:3.6
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cpe:2.3:a:openbsd:openssh:3.6.1
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cpe:2.3:a:openbsd:openssh:3.6.1p1
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cpe:2.3:a:openbsd:openssh:3.6.1p2
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cpe:2.3:a:openbsd:openssh:3.7
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cpe:2.3:a:openbsd:openssh:3.7.1
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cpe:2.3:a:openbsd:openssh:3.7.1p1
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cpe:2.3:a:openbsd:openssh:3.7.1p2
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cpe:2.3:a:openbsd:openssh:3.8
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cpe:2.3:a:openbsd:openssh:3.8.1
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cpe:2.3:a:openbsd:openssh:3.8.1p1
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cpe:2.3:a:openbsd:openssh:3.9
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cpe:2.3:a:openbsd:openssh:3.9.1
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cpe:2.3:a:openbsd:openssh:3.9.1p1
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cpe:2.3:a:openbsd:openssh:4.0
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cpe:2.3:a:openbsd:openssh:4.0p1
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cpe:2.3:a:openbsd:openssh:4.1
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cpe:2.3:a:openbsd:openssh:4.1p1
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cpe:2.3:a:openbsd:openssh:4.2
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cpe:2.3:a:openbsd:openssh:4.2p1
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cpe:2.3:a:openbsd:openssh:4.3
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cpe:2.3:a:openbsd:openssh:4.3p1
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cpe:2.3:a:openbsd:openssh:4.3p2
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cpe:2.3:a:openbsd:openssh:4.4
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cpe:2.3:a:openbsd:openssh:4.4p1
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cpe:2.3:a:openbsd:openssh:4.5
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cpe:2.3:a:openbsd:openssh:4.6
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cpe:2.3:a:openbsd:openssh:4.7
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cpe:2.3:a:openbsd:openssh:4.7p1
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cpe:2.3:a:openbsd:openssh:4.8
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cpe:2.3:a:openbsd:openssh:4.9
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cpe:2.3:a:openbsd:openssh:5.0
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cpe:2.3:a:openbsd:openssh:5.1
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cpe:2.3:a:openbsd:openssh:5.2
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cpe:2.3:a:openbsd:openssh:5.3
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cpe:2.3:a:openbsd:openssh:5.4
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cpe:2.3:a:openbsd:openssh:5.5
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cpe:2.3:a:openbsd:openssh:5.6
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cpe:2.3:a:openbsd:openssh:5.7
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cpe:2.3:a:openbsd:openssh:5.8
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cpe:2.3:a:openbsd:openssh:5.8p2
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cpe:2.3:a:openbsd:openssh:5.9
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cpe:2.3:a:openbsd:openssh:6.0
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cpe:2.3:a:openbsd:openssh:6.1
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cpe:2.3:a:openbsd:openssh:6.2
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cpe:2.3:a:openbsd:openssh:6.3
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cpe:2.3:a:openbsd:openssh:6.4
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cpe:2.3:a:openbsd:openssh:6.5
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cpe:2.3:a:openbsd:openssh:6.6
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cpe:2.3:a:openbsd:openssh:6.7
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cpe:2.3:a:openbsd:openssh:6.8
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cpe:2.3:a:openbsd:openssh:6.9
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cpe:2.3:a:openbsd:openssh:7.0
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cpe:2.3:a:openbsd:openssh:7.1
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cpe:2.3:a:openbsd:openssh:7.2
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cpe:2.3:a:openbsd:openssh:7.3
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cpe:2.3:a:openbsd:openssh:7.4
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cpe:2.3:a:openbsd:openssh:7.5
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cpe:2.3:a:openbsd:openssh:7.6
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cpe:2.3:a:openbsd:openssh:7.7
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cpe:2.3:a:openbsd:openssh:7.8
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cpe:2.3:a:openbsd:openssh:7.9
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cpe:2.3:a:openbsd:openssh:8.0
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cpe:2.3:a:openbsd:openssh:8.1
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cpe:2.3:a:openbsd:openssh:8.2
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cpe:2.3:a:openbsd:openssh:8.3
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cpe:2.3:a:openbsd:openssh:8.4
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cpe:2.3:a:openbsd:openssh:8.5
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cpe:2.3:a:openbsd:openssh:8.6
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cpe:2.3:a:openbsd:openssh:8.7
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cpe:2.3:a:openbsd:openssh:8.8
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cpe:2.3:a:openbsd:openssh:8.9
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cpe:2.3:a:openbsd:openssh:9.0
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cpe:2.3:a:openbsd:openssh:9.1
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cpe:2.3:a:openbsd:openssh:9.2
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cpe:2.3:a:openbsd:openssh:9.3
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cpe:2.3:a:openbsd:openssh:9.4
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cpe:2.3:a:openbsd:openssh:9.5
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cpe:2.3:a:openbsd:openssh:9.6
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cpe:2.3:a:openbsd:openssh:9.7
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cpe:2.3:a:openbsd:openssh:9.8
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cpe:2.3:a:openbsd:openssh:9.9
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cpe:2.3:o:fedoraproject:fedora:39
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cpe:2.3:o:redhat:enterprise_linux:8.0
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cpe:2.3:o:redhat:enterprise_linux:9.0