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    CVE-2014-6053

    The rfbProcessClientNormalMessage function in libvncserver/rfbserver.c in LibVNCServer 0.9.9 and earlier does not properly handle attempts to send a large amount of ClientCutText data, which allows remote attackers to cause a denial of service (memory consumption or daemon crash) via a crafted message that is processed by using a single unchecked malloc.

    Published:Sep 23, 2014
    Last Modified:Apr 12, 2025
    EPS:Dec 15, 2014
    EPSS Score:0.36865
    CVSS Score:5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Libvncserver
    Product
    Libvncserver
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
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    References

    http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html
    http://seclists.org/oss-sec/2014/q3/639
    http://secunia.com/advisories/61506
    http://secunia.com/advisories/61682
    http://ubuntu.com/usn/usn-2365-1
    http://www.debian.org/security/2014/dsa-3081
    http://www.ocert.org/advisories/ocert-2014-007.html
    http://www.openwall.com/lists/oss-security/2014/09/25/11
    https://github.com/newsoft/libvncserver/commit/6037a9074d52b1963c97cb28ea1096c7c14cbf28
    https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
    https://lists.debian.org/debian-lts-announce/2019/11/msg00032.html
    https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
    https://security.gentoo.org/glsa/201507-07
    https://usn.ubuntu.com/4573-1/
    https://usn.ubuntu.com/4587-1/
    http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html
    http://seclists.org/oss-sec/2014/q3/639
    http://secunia.com/advisories/61506
    http://secunia.com/advisories/61682
    http://ubuntu.com/usn/usn-2365-1
    http://www.debian.org/security/2014/dsa-3081
    http://www.ocert.org/advisories/ocert-2014-007.html
    http://www.openwall.com/lists/oss-security/2014/09/25/11
    https://github.com/newsoft/libvncserver/commit/6037a9074d52b1963c97cb28ea1096c7c14cbf28
    https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
    https://lists.debian.org/debian-lts-announce/2019/11/msg00032.html
    https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
    https://security.gentoo.org/glsa/201507-07
    https://usn.ubuntu.com/4573-1/
    https://usn.ubuntu.com/4587-1/

    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