CVE-2023-6004

Published: 3 January 2024

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.

Notes

Author	Note
mdeslaur	original patches introduce a regression, see upstream bug

Priority

Cvss 3 Severity Score

4.8

Score breakdown

Status

Package	Release	Status
libssh Launchpad, Ubuntu, Debian	bionic	Released (0.8.0~20170825.94fa1e38-1ubuntu0.7+esm3) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	focal	Released (0.9.3-2ubuntu2.5)
	jammy	Released (0.9.6-2ubuntu0.22.04.3)
	lunar	Released (0.10.4-2ubuntu0.3)
	mantic	Released (0.10.5-3ubuntu1.2)
	trusty	Ignored (end of standard support)
	upstream	Released (0.10.6-1)
	xenial	Released (0.6.3-4.3ubuntu0.6+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	Patches: upstream: https://gitlab.com/libssh/libssh-mirror/-/commit/c2c56bacab00766d01671413321d564227aabf19 upstream: https://gitlab.com/libssh/libssh-mirror/-/commit/a66b4a6eae6614d200a3625862d77565b96a7cd3 upstream: https://gitlab.com/libssh/libssh-mirror/-/commit/8615c24647f773a5e04203c7459512715d698be1 upstream: https://gitlab.com/libssh/libssh-mirror/-/commit/c6180409677c765e6b9ae2b18a3a7a9671ac1dbe upstream: https://gitlab.com/libssh/libssh-mirror/-/commit/9bbb817c0c5434f03613d0783b2ef5f52235b901 upstream: https://gitlab.com/libssh/libssh-mirror/-/commit/22492b69bba22b102342afc574800d354a08e405 upstream: https://gitlab.com/libssh/libssh-mirror/-/commit/d7467498fd988949edde9c6384973250fd454a8b upstream: https://gitlab.com/libssh/libssh-mirror/-/commit/62d3101c1f76b6891b70c50154e0e934d6b8cb57 upstream: https://gitlab.com/libssh/libssh-mirror/-/commit/cea841d71c025f9c998b7d5fc9f2a2839df62921 upstream: https://gitlab.com/libssh/libssh-mirror/-/commit/2c492ee179d5caa2718c5e768bab6e0b2b64a8b0 upstream: https://gitlab.com/libssh/libssh-mirror/-/commit/1a02364b5107a4125ea3cb76fcdb6beabaebf3be upstream: https://gitlab.com/libssh/libssh-mirror/-/commit/6f1b1e76bb38bc89819132e1810e4301ec9034a4

Severity score breakdown

Parameter	Value
Base score	4.8
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	Required
Scope	Unchanged
Confidentiality	Low
Integrity impact	Low
Availability impact	Low
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

References

Bugs

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