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    CVE-2013-4852

    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.

    Published:Aug 19, 2013
    Last Modified:Apr 11, 2025
    EPS:Aug 19, 2013
    EPSS Score:0.01751
    CVSS Score:6.8

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Opensuse
    Product
    Opensuse
    Vendor
    Putty
    Product
    Putty
    Vendor
    Simon Tatham
    Product
    Putty
    Vendor
    Winscp
    Product
    Winscp

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    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://secunia.com/advisories/54379
    http://secunia.com/advisories/54517
    http://secunia.com/advisories/54533
    http://svn.tartarus.org/sgt?view=revision&sortby=date&revision=9896
    http://winscp.net/tracker/show_bug.cgi?id=1017
    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://secunia.com/advisories/54379
    http://secunia.com/advisories/54517
    http://secunia.com/advisories/54533
    http://svn.tartarus.org/sgt?view=revision&sortby=date&revision=9896
    http://winscp.net/tracker/show_bug.cgi?id=1017
    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

    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