CVEvulnerability

CVE-2023-51767

7.0 HIGH Published 2023-12-24 Modified 2026-10-15 Official page ↗

Status: Modified
Published: 2023-12-24
Last modified: 2026-10-15
Assigner: [email protected]
CVSS 3.1 ([email protected]): 7.0 HIGH — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 7.0 HIGH — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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."

Affected configurations

• openbsd openssh • fedoraproject fedora 39 • redhat enterprise linux 8.0 • redhat enterprise linux 9.0

References

https://access.redhat.com/security/cve/CVE-2023-51767 Third Party Advisory
https://arxiv.org/abs/2309.02545 Technical Description
https://bugzilla.redhat.com/show_bug.cgi?id=2255850 Issue Tracking, Third Party Advisory
https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77 Product
https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878 Product
https://security.netapp.com/advisory/ntap-20240125-0006/ Third Party Advisory
https://ubuntu.com/security/CVE-2023-51767 Third Party Advisory
https://www.openwall.com/lists/oss-security/2025/09/22/1 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/22/1 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/22/2 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/23/1 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/23/3 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/23/4 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/23/5 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/24/4 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/24/7 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/25/2 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/25/6 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/26/2 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/26/4 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/27/1 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/27/2 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/27/3 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/27/4 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/27/5 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/27/6 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/27/7 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/28/7 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/29/1 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/29/4 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/29/5 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/09/29/6 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/10/01/1 www.openwall.com
http://www.openwall.com/lists/oss-security/2025/10/01/2 www.openwall.com
https://access.redhat.com/security/cve/CVE-2023-51767 Third Party Advisory
https://arxiv.org/abs/2309.02545 Technical Description
https://bugzilla.redhat.com/show_bug.cgi?id=2255850 Issue Tracking, Third Party Advisory
https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77 Product
https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878 Product
https://security.netapp.com/advisory/ntap-20240125-0006/ Third Party Advisory
https://ubuntu.com/security/CVE-2023-51767 Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-794697.html cert-portal.siemens.com