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CVE-2018-5733

Status Candidate

Overview

A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0.

Related Files

Ubuntu Security Notice USN-3586-2
Posted May 28, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3586-2 - USN-3586-1 fixed a vulnerability in DHCP. This update provides the corresponding update for Ubuntu 12.04 ESM. Felix Wilhelm discovered that the DHCP client incorrectly handled certain malformed responses. A remote attacker could use this issue to cause the DHCP client to crash, resulting in a denial of service, or possibly execute arbitrary code. In the default installation, attackers would be isolated by the dhclient AppArmor profile. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2018-5732, CVE-2018-5733
MD5 | ec9c25c8d7d65f1459d5b60f1ae14ab6
Gentoo Linux Security Advisory 201804-05
Posted Apr 8, 2018
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201804-5 - Multiple vulnerabilities have been found in ISC DHCP, the worst of which could allow for the remote execution of arbitrary code. Versions less than 4.3.6_p1 are affected.

tags | advisory, remote, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2017-3144, CVE-2018-5732, CVE-2018-5733
MD5 | 62fd572b61cd226737b1d257964ff493
Red Hat Security Advisory 2018-0483-01
Posted Mar 12, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-0483-01 - 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. The dhcp packages provide a relay agent and ISC DHCP service required to enable and administer DHCP on a network. Multiple security issues were addressed.

tags | advisory, protocol
systems | linux, redhat
advisories | CVE-2018-5732, CVE-2018-5733
MD5 | f3e3d81a00a20a71205ae0027ffef001
Red Hat Security Advisory 2018-0469-01
Posted Mar 9, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-0469-01 - 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. The dhcp packages provide a relay agent and ISC DHCP service required to enable and administer DHCP on a network. Security Fix: dhcp: Buffer overflow in dhclient possibly allowing code execution triggered by malicious server.

tags | advisory, overflow, code execution, protocol
systems | linux, redhat
advisories | CVE-2018-5732, CVE-2018-5733
MD5 | a73856966bf4f50cab1efc1ce7e973af
Debian Security Advisory 4133-1
Posted Mar 8, 2018
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4133-1 - Several vulnerabilities have been discovered in the ISC DHCP client, relay and server.

tags | advisory, vulnerability
systems | linux, debian
advisories | CVE-2017-3144, CVE-2018-5732, CVE-2018-5733
MD5 | a6967bf4a2bc8ee314cbd8bcf359282c
Slackware Security Advisory - dhcp Updates
Posted Mar 1, 2018
Authored by Slackware Security Team | Site slackware.com

Slackware Security Advisory - New dhcp packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, 14.2, and -current to fix security issues.

tags | advisory
systems | linux, slackware
advisories | CVE-2018-5732, CVE-2018-5733
MD5 | 1ac718cf67f39c9e7d505db208a9a244
Ubuntu Security Notice USN-3586-1
Posted Mar 1, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3586-1 - Konstantin Orekhov discovered that the DHCP server incorrectly handled a large number of concurrent TCP sessions. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. It was discovered that the DHCP server incorrectly handled socket descriptors. A remote attacker could possibly use this issue to cause a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service, tcp
systems | linux, ubuntu
advisories | CVE-2016-2774, CVE-2017-3144, CVE-2018-5732, CVE-2018-5733
MD5 | 08aea38d77f392f613434bd52973ae94
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