CVE-2023-51767

Description

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 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.

7.0

CVSS

Severity: High

CVSS 3.1 •

EPSS 0.01%

Third-Party Advisory redhat.com Third-Party Advisory redhat.com Third-Party Advisory netapp.com Third-Party Advisory ubuntu.com

Affected: n/a n/a

References

Link	Tags
https://arxiv.org/abs/2309.02545	technical description
https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878	product
https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77	product
https://bugzilla.redhat.com/show_bug.cgi?id=2255850	third party advisory issue tracking
https://access.redhat.com/security/cve/CVE-2023-51767	third party advisory
https://ubuntu.com/security/CVE-2023-51767	third party advisory
https://security.netapp.com/advisory/ntap-20240125-0006/	third party advisory

Frequently Asked Questions

What is the severity of CVE-2023-51767?: CVE-2023-51767 has been scored as a high severity vulnerability.
How to fix CVE-2023-51767?: To fix CVE-2023-51767, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-51767 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2023-51767 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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