CVE-2024-39894
- State
- Published
- Severity
- 7.5 High
- Published
- Jul 2, 2024
- Updated
- Nov 4, 2025
- Reserved
- Jul 2, 2024
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
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
- [oss-security] 20240703 Re: Announce: OpenSSH 9.8 releasedmailing-list
- https://security.netapp.com/advisory/ntap-20240712-0004/
- [oss-security] 20240723 Re: linux-distros application for CentOS Project's Hyperscale SIGmailing-list
- [oss-security] 20240723 Re: linux-distros application for CentOS Project's Hyperscale SIGmailing-list
- [oss-security] 20240728 Re: Announce: OpenSSH 9.8 releasedmailing-list
- https://crzphil.github.io/posts/ssh-obfuscation-bypass/
- https://news.ycombinator.com/item?id=41508530
- https://www.freebsd.org/security/advisories/FreeBSD-SA-25:01.openssh.asc
- http://seclists.org/fulldisclosure/2024/Sep/33
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