Vulnerability in N/a
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 attacks against keystroke entry could occur.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.016 (75.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openssh.com/txt/release-9.8
- lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html
- www.openwall.com/lists/oss-security/2024/07/02/1
- www.openwall.com/lists/oss-security/2024/07/03/6 (mailing-list)
- security.netapp.com/advisory/ntap-20240712-0004/
- www.openwall.com/lists/oss-security/2024/07/23/4 (mailing-list)
- www.openwall.com/lists/oss-security/2024/07/23/6 (mailing-list)
- www.openwall.com/lists/oss-security/2024/07/28/3 (mailing-list)
- crzphil.github.io/posts/ssh-obfuscation-bypass/
- news.ycombinator.com/item
Frequently asked questions
- What is CVE-2024-39894?
- CVE-2024-39894 is a high-severity vulnerability in N/a, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.5/10. Published 2024-07-02.
- How severe is CVE-2024-39894?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2024-39894 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.