| Name | CVE-2024-39894 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1076764 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| openssh (PTS) | jessie, jessie (lts) | 1:6.7p1-5+deb8u10 | fixed |
| stretch (security) | 1:7.4p1-10+deb9u6 | fixed |
| stretch (lts), stretch | 1:7.4p1-10+deb9u9 | fixed |
| buster (security), buster, buster (lts) | 1:7.9p1-10+deb10u4 | fixed |
| bullseye (security), bullseye | 1:8.4p1-5+deb11u3 | fixed |
| bookworm (security), bookworm | 1:9.2p1-2+deb12u3 | fixed |
| trixie, sid | 1:9.8p1-8 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| openssh | source | jessie | (not affected) | | | |
| openssh | source | stretch | (not affected) | | | |
| openssh | source | buster | (not affected) | | | |
| openssh | source | bullseye | (not affected) | | | |
| openssh | source | bookworm | (not affected) | | | |
| openssh | source | (unstable) | 1:9.8p1-1 | | | 1076764 |
Notes
[bookworm] - openssh <not-affected> (Vulnerable code not present)
[bullseye] - openssh <not-affected> (Vulnerable code not present)
https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html
https://www.openwall.com/lists/oss-security/2024/07/02/1
[buster] - openssh <not-affected> (Vulnerable code introduced later)
[stretch] - openssh <not-affected> (Vulnerable code introduced later)
[jessie] - openssh <not-affected> (Vulnerable code introduced later)