What’s Vulnerable › Vulnerabilities

CVE-2024-39894

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-02 · updated 2026-06-17
• Weakness: CWE-367

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.

Affected products

• OpenSSH: from 9.5 through 9.7

References

• http://www.openwall.com/lists/oss-security/2024/07/03/6
• 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://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html
• https://news.ycombinator.com/item?id=41508530
• https://security.netapp.com/advisory/ntap-20240712-0004/
• https://www.openssh.com/txt/release-9.8
• https://www.openwall.com/lists/oss-security/2024/07/02/1
• http://seclists.org/fulldisclosure/2024/Sep/33
• http://www.openwall.com/lists/oss-security/2024/07/03/6

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