Gentoo Linux Security Advisory 201301-6 - Multiple vulnerabilities have been found in ISC DHCP, the worst of which may allow remote Denial of Service. Versions less than 4.2.4_p2 are affected.
ac6c1cdcdb260a60ea33f01cd8f575d6Debian Linux Security Advisory 2519-2 - It was discovered that the recent update for isc-dhcp, did not contain the patched code included in the source package. Due to quirk in the build system those patches were deapplied during the build process.
c5916597a21533fdfb1e3245d73547d0Red Hat Security Advisory 2012-1141-01 - The Dynamic Host Configuration Protocol is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. A denial of service flaw was found in the way the dhcpd daemon handled zero-length client identifiers. A remote attacker could use this flaw to send a specially-crafted request to dhcpd, possibly causing it to enter an infinite loop and consume an excessive amount of CPU time. Two memory leak flaws were found in the dhcpd daemon. A remote attacker could use these flaws to cause dhcpd to exhaust all available memory by sending a large number of DHCP requests.
c9da33843699668bd16e0b1663972152Red Hat Security Advisory 2012-1140-01 - The Dynamic Host Configuration Protocol is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. A denial of service flaw was found in the way the dhcpd daemon handled zero-length client identifiers. A remote attacker could use this flaw to send a specially-crafted request to dhcpd, possibly causing it to enter an infinite loop and consume an excessive amount of CPU time. Upstream acknowledges Markus Hietava of the Codenomicon CROSS project as the original reporter of this issue.
23743cbabe11b79d8a26732e8b0f6317Debian Linux Security Advisory 2519-1 - Several security vulnerabilities affecting ISC dhcpd, a server for automatic IP address assignment, have been discovered. Additionally, the latest security update for isc-dhcp, DSA-2516-1, did not properly apply the patches for CVE-2012-3571 and CVE-2012-3954. This has been addressed in this additional update.
9809d9fb5ab7de7ca4c84c1abd546a24Proof of concept denial of service exploit for the zero length client id infinite loop vulnerability in DHCP version 4.1.2.
acd26c3b35f867f8759ed93617b5abafMandriva Linux Security Advisory 2012-116 - An error in the handling of malformed client identifiers can cause a DHCP server running affected versions to enter a state where further client requests are not processed and the server process loops endlessly, consuming all available CPU cycles. Under normal circumstances this condition should not be triggered, but a non-conforming or malicious client could deliberately trigger it in a vulnerable server. In order to exploit this condition an attacker must be able to send requests to the DHCP server. Two memory leaks have been found and fixed in ISC DHCP. The updated packages have been patched to correct these issues.
8b3cbe9c81ae315761885e0079613fc8Mandriva Linux Security Advisory 2012-115 - An unexpected client identifier parameter can cause the ISC DHCP daemon to segmentation fault when running in DHCPv6 mode, resulting in a denial of service to further client requests. In order to exploit this condition, an attacker must be able to send requests to the DHCP server. An error in the handling of malformed client identifiers can cause a DHCP server running affected versions to enter a state where further client requests are not processed and the server process loops endlessly, consuming all available CPU cycles. Under normal circumstances this condition should not be triggered, but a non-conforming or malicious client could deliberately trigger it in a vulnerable server. In order to exploit this condition an attacker must be able to send requests to the DHCP server. Two memory leaks have been found and fixed in ISC DHCP. The updated packages have been upgraded to the latest version which is not affected by these issues.
b8bec5432648e11ee761ae836102755bUbuntu Security Notice 1519-1 - Markus Hietava discovered that the DHCP server incorrectly handled certain malformed client identifiers. A remote attacker could use this issue to cause DHCP to crash, resulting in a denial of service. Glen Eustace discovered that the DHCP server incorrectly handled memory. A remote attacker could use this issue to cause DHCP to crash, resulting in a denial of service.
63b6d994154e23aa406b1747f3227794Debian Linux Security Advisory 2516-1 - Two security vulnerabilities affecting ISC dhcpd, a server for automatic IP address assignment, in Debian have been discovered.
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