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 applications responsibility to defend against platform architectural weaknesses.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openssh | Openbsd | * | * |
| Openssh | Ubuntu | bionic | * |
| Openssh | Ubuntu | lunar | * |
| Openssh | Ubuntu | trusty | * |
| Openssh | Ubuntu | xenial | * |
| Openssh-ssh1 | Ubuntu | bionic | * |
| Openssh-ssh1 | Ubuntu | lunar | * |
| Openssh-ssh1 | Ubuntu | upstream | * |
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
- http://www.openwall.com/lists/oss-security/2025/09/22/1
- http://www.openwall.com/lists/oss-security/2025/09/22/2
- http://www.openwall.com/lists/oss-security/2025/09/23/1
- http://www.openwall.com/lists/oss-security/2025/09/23/3
- http://www.openwall.com/lists/oss-security/2025/09/23/4
- http://www.openwall.com/lists/oss-security/2025/09/23/5
- http://www.openwall.com/lists/oss-security/2025/09/24/4
- http://www.openwall.com/lists/oss-security/2025/09/24/7
- http://www.openwall.com/lists/oss-security/2025/09/25/2
- http://www.openwall.com/lists/oss-security/2025/09/25/6
- http://www.openwall.com/lists/oss-security/2025/09/26/2
- http://www.openwall.com/lists/oss-security/2025/09/26/4
- http://www.openwall.com/lists/oss-security/2025/09/27/1
- http://www.openwall.com/lists/oss-security/2025/09/27/2
- http://www.openwall.com/lists/oss-security/2025/09/27/3
- http://www.openwall.com/lists/oss-security/2025/09/27/4
- http://www.openwall.com/lists/oss-security/2025/09/27/5
- http://www.openwall.com/lists/oss-security/2025/09/27/6
- http://www.openwall.com/lists/oss-security/2025/09/27/7
- http://www.openwall.com/lists/oss-security/2025/09/28/7
- http://www.openwall.com/lists/oss-security/2025/09/29/1
- http://www.openwall.com/lists/oss-security/2025/09/29/4
- http://www.openwall.com/lists/oss-security/2025/09/29/5
- http://www.openwall.com/lists/oss-security/2025/09/29/6
- http://www.openwall.com/lists/oss-security/2025/10/01/1
- http://www.openwall.com/lists/oss-security/2025/10/01/2
- 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