CVE-2024-39894
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
02 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
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 1.63% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 75.8% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVD analysis status
- Deferred. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2024-07-02 00:00Z2 YR AGO
- Last updated
- 2025-11-04 16:12Z11 MO AGO
- Reserved
- 2024-07-02
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- Data version
- 5.2
- Document digest
- 00be1ff508a46629d98112668c0664f790a69346882621f6e3ed4985edffe081
05 Affected products
06 References
- www.openssh.comhttps://www.openssh.com/txt/release-9.8
- lists.mindrot.orghttps://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html
- www.openwall.comhttps://www.openwall.com/lists/oss-security/2024/07/02/1
- www.openwall.com[oss-security] 20240703 Re: Announce: OpenSSH 9.8 releasedhttp://www.openwall.com/lists/oss-security/2024/07/03/6
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20240712-0004/
- www.openwall.com[oss-security] 20240723 Re: linux-distros application for CentOS Project's Hyperscale SIGhttp://www.openwall.com/lists/oss-security/2024/07/23/4
- www.openwall.com[oss-security] 20240723 Re: linux-distros application for CentOS Project's Hyperscale SIGhttp://www.openwall.com/lists/oss-security/2024/07/23/6
- www.openwall.com[oss-security] 20240728 Re: Announce: OpenSSH 9.8 releasedhttp://www.openwall.com/lists/oss-security/2024/07/28/3
- crzphil.github.iohttps://crzphil.github.io/posts/ssh-obfuscation-bypass/
- news.ycombinator.comhttps://news.ycombinator.com/item?id=41508530
- www.freebsd.orghttps://www.freebsd.org/security/advisories/FreeBSD-SA-25:01.openssh.asc
- seclists.orghttp://seclists.org/fulldisclosure/2024/Sep/33
07 Fixed in
Debian 13
- openssh Fixed in 1:9.8p1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- openssh Fixed in 1:9.8p1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- openssh Fixed in 1:9.6p1-3ubuntu13.4
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.