UBUNTU-CVE-2023-6004

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    UBUNTU-CVE-2023-6004

    Published: 3 Jan 2024Last Modified: 22 Apr 2026
    Upstream:
    CVE-2023-6004

    Summary:

    Details: 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.

    References: https://ubuntu.com/security/CVE-2023-6004, https://vin01.github.io/piptagole/ssh/security/openssh/libssh/remote-code-execution/2023/12/20/openssh-proxycommand-libssh-rce.html, https://www.libssh.org/security/advisories/CVE-2023-6004.txt, https://ubuntu.com/security/notices/USN-6592-1, https://ubuntu.com/security/notices/USN-6592-2, https://www.cve.org/CVERecord?id=CVE-2023-6004

    Affected packages

    Package

    Name: libssh

    Purl: pkg:deb/ubuntu/[email protected]+esm1?arch=source&distro=esm-infra/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.6.3-4.3ubuntu0.6+esm1

    Affected versions

    0.6.3-3ubuntu3
    0.6.3-4.1
    0.6.3-4.2
    0.6.3-4.2ubuntu1
    0.6.3-4.3
    0.6.3-4.3ubuntu0.1
    0.6.3-4.3ubuntu0.2
    0.6.3-4.3ubuntu0.5
    0.6.3-4.3ubuntu0.6

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High