CVE-2013-4852

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    CVE-2013-4852

    Published: 19 Aug 2013Last Modified: 16 Apr 2026

    Summary:

    Details: Integer overflow in PuTTY 0.62 and earlier, WinSCP before 5.1.6, and other products that use PuTTY allows remote SSH servers to cause a denial of service (crash) and possibly execute arbitrary code in certain applications that use PuTTY via a negative size value in an RSA key signature during the SSH handshake, which triggers a heap-based buffer overflow.

    References: http://secunia.com/advisories/54379, http://secunia.com/advisories/54517, http://secunia.com/advisories/54533, http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-signature-stringlen.html, http://www.debian.org/security/2013/dsa-2736, http://www.search-lab.hu/advisories/secadv-20130722, http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=718779, http://lists.opensuse.org/opensuse-updates/2013-08/msg00035.html, http://lists.opensuse.org/opensuse-updates/2013-08/msg00041.html, http://svn.tartarus.org/sgt?view=revision&sortby=date&revision=9896, http://winscp.net/tracker/show_bug.cgi?id=1017

    Affected packages

    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
    CVE-2013-4852 | CVE-DB