CVE-2017-6542

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    CVE-2017-6542

    Published: 27 Mar 2017Last Modified: 16 Apr 2026

    Summary:

    Details: The ssh_agent_channel_data function in PuTTY before 0.68 allows remote attackers to have unspecified impact via a large length value in an agent protocol message and leveraging the ability to connect to the Unix-domain socket representing the forwarded agent connection, which trigger a buffer overflow.

    References: http://www.securitytracker.com/id/1038067, https://git.tartarus.org/?p=simon/putty.git%3Ba=commitdiff%3Bh=4ff22863d895cb7ebfced4cf923a012a614adaa8, https://www.exploit-db.com/exploits/42137/, http://lists.opensuse.org/opensuse-updates/2017-03/msg00055.html, http://www.securityfocus.com/bid/97156, https://security.gentoo.org/glsa/201703-03, https://security.gentoo.org/glsa/201706-09, http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-agent-fwd-overflow.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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