medium
6.1
CWE
399 476
Advisory Published
Updated

CVE-2011-4868: Null Pointer Dereference

First published: Sun Jan 15 2012(Updated: )

The logging functionality in dhcpd in ISC DHCP before 4.2.3-P2, when using Dynamic DNS (DDNS) and issuing IPv6 addresses, does not properly handle the DHCPv6 lease structure, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted packets related to a lease-status update.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
ISC DHCP Client<=4.2.3
ISC DHCP Client=3.0
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-beta2
ISC DHCP Client=3.0-rc1
ISC DHCP Client=3.0-rc1
ISC DHCP Client=3.0-rc10
ISC DHCP Client=3.0-rc11
ISC DHCP Client=3.0-rc12
ISC DHCP Client=3.0-rc2
ISC DHCP Client=3.0-rc2
ISC DHCP Client=3.0-rc3
ISC DHCP Client=3.0-rc4
ISC DHCP Client=3.0-rc5
ISC DHCP Client=3.0-rc6
ISC DHCP Client=3.0-rc7
ISC DHCP Client=3.0-rc8
ISC DHCP Client=3.0-rc8
ISC DHCP Client=3.0-rc9
ISC DHCP Client=3.0.1
ISC DHCP Client=3.0.1-rc1
ISC DHCP Client=3.0.1-rc10
ISC DHCP Client=3.0.1-rc11
ISC DHCP Client=3.0.1-rc12
ISC DHCP Client=3.0.1-rc13
ISC DHCP Client=3.0.1-rc14
ISC DHCP Client=3.0.1-rc2
ISC DHCP Client=3.0.1-rc3
ISC DHCP Client=3.0.1-rc4
ISC DHCP Client=3.0.1-rc5
ISC DHCP Client=3.0.1-rc6
ISC DHCP Client=3.0.1-rc7
ISC DHCP Client=3.0.1-rc8
ISC DHCP Client=3.0.1-rc9
ISC DHCP Client=3.0.2
ISC DHCP Client=3.0.2-b1
ISC DHCP Client=3.0.2-rc1
ISC DHCP Client=3.0.2-rc2
ISC DHCP Client=3.0.2-rc3
ISC DHCP Client=3.0.3
ISC DHCP Client=3.0.3-b1
ISC DHCP Client=3.0.3-b2
ISC DHCP Client=3.0.3-b3
ISC DHCP Client=3.0.4
ISC DHCP Client=3.0.4-b1
ISC DHCP Client=3.0.4-b2
ISC DHCP Client=3.0.4-b3
ISC DHCP Client=3.0.4-rc1
ISC DHCP Client=3.0.5
ISC DHCP Client=3.0.5-rc1
ISC DHCP Client=3.0.6-rc1
ISC DHCP Client=3.1.0
ISC DHCP Client=3.1.0-a1
ISC DHCP Client=3.1.0-a2
ISC DHCP Client=3.1.0-a3
ISC DHCP Client=3.1.0-b1
ISC DHCP Client=3.1.0-b2
ISC DHCP Client=4.0.0
ISC DHCP Client=4.0.0-a1
ISC DHCP Client=4.0.0-a2
ISC DHCP Client=4.0.0-a3
ISC DHCP Client=4.0.0-b1
ISC DHCP Client=4.0.0-b2
ISC DHCP Client=4.0.0-b3
ISC DHCP Client=4.1.0
ISC DHCP Client=4.1.0-a1
ISC DHCP Client=4.1.0-a2
ISC DHCP Client=4.1.0-b1
ISC DHCP Client=4.2.0
ISC DHCP Client=4.2.0-a1
ISC DHCP Client=4.2.0-a2
ISC DHCP Client=4.2.0-b1
ISC DHCP Client=4.2.0-b2
ISC DHCP Client=4.2.0-rc1
ISC DHCP Client=4.2.1
ISC DHCP Client=4.2.1-b1
ISC DHCP Client=4.2.1-rc1
ISC DHCP Client=4.2.2
ISC DHCP Client=4.2.2-b1
ISC DHCP Client=4.2.2-rc1
ISC DHCP Client=4.2.3

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-4868?

    CVE-2011-4868 has been classified as a high severity vulnerability due to its potential to cause denial of service.

  • How do I fix CVE-2011-4868?

    To fix CVE-2011-4868, upgrade to ISC DHCP version 4.2.3-P2 or later.

  • What types of attacks can exploit CVE-2011-4868?

    CVE-2011-4868 can be exploited by remote attackers using crafted packets to trigger a NULL pointer dereference.

  • Which software versions are affected by CVE-2011-4868?

    ISC DHCP versions prior to 4.2.3-P2, including versions 3.0 and various 3.0-beta2 versions, are affected.

  • What impact does CVE-2011-4868 have on network services?

    CVE-2011-4868 can cause the ISC DHCP daemon to crash, leading to service disruptions in network environments.

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