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CVE-2011-4539

Status Candidate

Overview

dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service (daemon crash) via a crafted request packet.

Related Files

Gentoo Linux Security Advisory 201301-06
Posted Jan 9, 2013
Authored by Gentoo | Site security.gentoo.org

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.

tags | advisory, remote, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2011-0997, CVE-2011-2748, CVE-2011-2749, CVE-2011-4539, CVE-2011-4868, CVE-2012-3570, CVE-2012-3571, CVE-2012-3954, CVE-2012-3955
MD5 | ac6c1cdcdb260a60ea33f01cd8f575d6
Debian Security Advisory 2519-2
Posted Aug 4, 2012
Authored by Debian | Site debian.org

Debian 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.

tags | advisory
systems | linux, debian
advisories | CVE-2011-4539, CVE-2012-3571, CVE-2012-3954
MD5 | c5916597a21533fdfb1e3245d73547d0
Debian Security Advisory 2519-1
Posted Aug 2, 2012
Authored by Debian | Site debian.org

Debian 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.

tags | advisory, vulnerability
systems | linux, debian
advisories | CVE-2011-4539, CVE-2012-3571, CVE-2012-3954
MD5 | 9809d9fb5ab7de7ca4c84c1abd546a24
Ubuntu Security Notice USN-1309-1
Posted Dec 15, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1309-1 - It was discovered that the DHCP server incorrectly handled certain malformed packets when configured to evaluate regular expressions. A remote attacker could use this issue to cause DHCP to crash, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2011-4539
MD5 | 8d3eee6d25b377c0ca792ccbd4565636
Red Hat Security Advisory 2011-1819-01
Posted Dec 15, 2011
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2011-1819-01 - 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 DHCP request packets when regular expression matching was used in "/etc/dhcp/dhcpd.conf". A remote attacker could use this flaw to crash dhcpd. Users of DHCP should upgrade to these updated packages, which contain a backported patch to correct this issue. After installing this update, all DHCP servers will be restarted automatically.

tags | advisory, remote, denial of service, protocol
systems | linux, redhat
advisories | CVE-2011-4539
MD5 | 1fb1f1180f22c2433e9e56ee0633281f
Mandriva Linux Security Advisory 2011-182
Posted Dec 9, 2011
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2011-182 - dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service via a crafted request packet. The updated packages have been patched to correct this issue.

tags | advisory, remote, denial of service
systems | linux, mandriva
advisories | CVE-2011-4539
MD5 | 02e671a603aea3de4daba7a8e7064881
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