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    CVE-2012-3955

    ISC DHCP 4.1.x before 4.1-ESV-R7 and 4.2.x before 4.2.4-P2 allows remote attackers to cause a denial of service (daemon crash) in opportunistic circumstances by establishing an IPv6 lease in an environment where the lease expiration time is later reduced.

    Published:Sep 12, 2012
    Last Modified:Apr 11, 2025
    EPS:Sep 14, 2012
    EPSS Score:0.12095
    CVSS Score:7.1

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Isc
    Product
    Dhcp
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    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…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
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    References

    http://lists.fedoraproject.org/pipermail/package-announce/2012-October/088882.html
    http://lists.fedoraproject.org/pipermail/package-announce/2012-September/086992.html
    http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088220.html
    http://lists.opensuse.org/opensuse-updates/2012-09/msg00088.html
    http://lists.opensuse.org/opensuse-updates/2012-09/msg00103.html
    http://lists.opensuse.org/opensuse-updates/2012-09/msg00105.html
    http://rhn.redhat.com/errata/RHSA-2013-0504.html
    http://secunia.com/advisories/51318
    http://security.gentoo.org/glsa/glsa-201301-06.xml
    http://www.debian.org/security/2012/dsa-2551
    http://www.mandriva.com/security/advisories?name=MDVSA-2012:153
    http://www.securityfocus.com/bid/55530
    http://www.securitytracker.com/id?1027528
    http://www.ubuntu.com/usn/USN-1571-1
    https://blogs.oracle.com/sunsecurity/entry/cve_2012_3955_denial_of
    https://kb.isc.org/article/AA-00779
    http://lists.fedoraproject.org/pipermail/package-announce/2012-October/088882.html
    http://lists.fedoraproject.org/pipermail/package-announce/2012-September/086992.html
    http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088220.html
    http://lists.opensuse.org/opensuse-updates/2012-09/msg00088.html
    http://lists.opensuse.org/opensuse-updates/2012-09/msg00103.html
    http://lists.opensuse.org/opensuse-updates/2012-09/msg00105.html
    http://rhn.redhat.com/errata/RHSA-2013-0504.html
    http://secunia.com/advisories/51318
    http://security.gentoo.org/glsa/glsa-201301-06.xml
    http://www.debian.org/security/2012/dsa-2551
    http://www.mandriva.com/security/advisories?name=MDVSA-2012:153
    http://www.securityfocus.com/bid/55530
    http://www.securitytracker.com/id?1027528
    http://www.ubuntu.com/usn/USN-1571-1
    https://blogs.oracle.com/sunsecurity/entry/cve_2012_3955_denial_of
    https://kb.isc.org/article/AA-00779

    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