Description

OpenSSH 9.5 through 9.7 before 9.8 sometimes allows timing attacks against echo-off password entry (e.g., for su and Sudo) because of an ObscureKeystrokeTiming logic error. Similarly, other timing attacks against keystroke entry could occur.

Classification

CVE ID: CVE-2024-39894

Affected Products

Vendor: n/a

Product: n/a

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 15.63% (scored less or equal to compared to others)

EPSS Date: 2025-02-28 (when was this score calculated)

References

https://www.openssh.com/txt/release-9.8
https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html
https://www.openwall.com/lists/oss-security/2024/07/02/1
http://www.openwall.com/lists/oss-security/2024/07/03/6
https://security.netapp.com/advisory/ntap-20240712-0004/
http://www.openwall.com/lists/oss-security/2024/07/23/4
http://www.openwall.com/lists/oss-security/2024/07/23/6
http://www.openwall.com/lists/oss-security/2024/07/28/3
https://crzphil.github.io/posts/ssh-obfuscation-bypass/
https://news.ycombinator.com/item?id=41508530

Timeline