CVE-2023-51767: a bogus CVE in OpenSSH
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 mmanswerauthpassword 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."
Other sources
OpenSSH through 9.6, when common types of DRAM are used, might allow row hammer attacks (for authentication bypass) because the integer value of authenticated in mmanswerauthpassword 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.
— F5
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2023-51767?
CVE-2023-51767 is considered to have a moderate severity due to the potential for authentication bypass via row hammer attacks.
How do I fix CVE-2023-51767?
To mitigate CVE-2023-51767, upgrade OpenSSH to a version later than 9.6 that addresses this vulnerability.
Which software is affected by CVE-2023-51767?
CVE-2023-51767 affects OpenSSH versions up to and including 9.6, as well as specific versions of F5 Traffix SDC.
Can CVE-2023-51767 allow an attacker to bypass authentication?
Yes, CVE-2023-51767 may allow an attacker to bypass authentication under certain conditions due to a flaw in the authentication process.
What are row hammer attacks in relation to CVE-2023-51767?
Row hammer attacks exploit bit flips in DRAM to manipulate data, potentially allowing unauthorized access in the context of CVE-2023-51767.