CVE-2023-6004

2024-01-0300:00:00

ubuntu.com

libssh

injection

proxycommand

proxyjump

unchecked hostname syntax

4.8 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

5.5 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.7%

JSON

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.

Bugs

Notes

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

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlibssh< 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm3UNKNOWN
ubuntu20.04noarchlibssh< 0.9.3-2ubuntu2.5UNKNOWN
ubuntu22.04noarchlibssh< 0.9.6-2ubuntu0.22.04.3UNKNOWN
ubuntu23.04noarchlibssh< 0.10.4-2ubuntu0.3UNKNOWN
ubuntu23.10noarchlibssh< 0.10.5-3ubuntu1.2UNKNOWN
ubuntu16.04noarchlibssh< 0.6.3-4.3ubuntu0.6+esm1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	libssh	< 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm3	UNKNOWN
ubuntu	20.04	noarch	libssh	< 0.9.3-2ubuntu2.5	UNKNOWN
ubuntu	22.04	noarch	libssh	< 0.9.6-2ubuntu0.22.04.3	UNKNOWN
ubuntu	23.04	noarch	libssh	< 0.10.4-2ubuntu0.3	UNKNOWN
ubuntu	23.10	noarch	libssh	< 0.10.5-3ubuntu1.2	UNKNOWN
ubuntu	16.04	noarch	libssh	< 0.6.3-4.3ubuntu0.6+esm1	UNKNOWN