| Name | CVE-2023-6004 |
| Description | A flaw was found in libssh. By utilizing the ProxyCommand or ProxyJump feature, users can exploit unchecked hostname syntax on the client. This issue may allow an attacker to inject malicious code into the command of the features mentioned through the hostname parameter. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5591-1 |
| Debian Bugs | 1059061 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libssh (PTS) | jessie, jessie (lts) | 0.6.3-4+deb8u6 | vulnerable |
| stretch (security) | 0.7.3-2+deb9u3 | vulnerable | |
| stretch (lts), stretch | 0.7.3-2+deb9u4 | vulnerable | |
| buster (security), buster, buster (lts) | 0.8.7-1+deb10u2 | vulnerable | |
| bullseye (security), bullseye | 0.9.8-0+deb11u1 | fixed | |
| bookworm (security), bookworm | 0.10.6-0+deb12u1 | fixed | |
| sid, trixie | 0.11.1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| libssh | source | jessie | (unfixed) | end-of-life | ||
| libssh | source | bullseye | 0.9.8-0+deb11u1 | DSA-5591-1 | ||
| libssh | source | bookworm | 0.10.6-0+deb12u1 | DSA-5591-1 | ||
| libssh | source | (unstable) | 0.10.6-1 | 1059061 |
https://www.libssh.org/security/advisories/CVE-2023-6004.txt
https://vin01.github.io/piptagole/ssh/security/openssh/libssh/remote-code-execution/2023/12/20/openssh-proxycommand-libssh-rce.html
https://gitlab.com/libssh/libssh-mirror/-/commit/c2c56bacab00766d01671413321d564227aabf19 (libssh-0.10.6)
https://gitlab.com/libssh/libssh-mirror/-/commit/a66b4a6eae6614d200a3625862d77565b96a7cd3 (libssh-0.10.6)
https://gitlab.com/libssh/libssh-mirror/-/commit/8615c24647f773a5e04203c7459512715d698be1 (libssh-0.10.6)
https://gitlab.com/libssh/libssh-mirror/-/commit/c6180409677c765e6b9ae2b18a3a7a9671ac1dbe (libssh-0.10.6)
https://gitlab.com/libssh/libssh-mirror/-/commit/9bbb817c0c5434f03613d0783b2ef5f52235b901 (libssh-0.10.6)
https://gitlab.com/libssh/libssh-mirror/-/commit/22492b69bba22b102342afc574800d354a08e405 (libssh-0.10.6)
https://gitlab.com/libssh/libssh-mirror/-/commit/d7467498fd988949edde9c6384973250fd454a8b (libssh-0.10.6)
https://gitlab.com/libssh/libssh-mirror/-/commit/62d3101c1f76b6891b70c50154e0e934d6b8cb57 (libssh-0.10.6)
https://gitlab.com/libssh/libssh-mirror/-/commit/cea841d71c025f9c998b7d5fc9f2a2839df62921 (libssh-0.10.6)
https://gitlab.com/libssh/libssh-mirror/-/commit/2c492ee179d5caa2718c5e768bab6e0b2b64a8b0 (libssh-0.10.6)
Original patchset introduces a regression (with IPv6 parsing in ssh_options_set API):
https://gitlab.com/libssh/libssh-mirror/-/issues/227