The dhcpcd DHCP client before 1.3.22 allows remote attackers to cause a denial of service (daemon crash) via unknown vectors that cause an out-of-bounds memory read.

This advisory adds security support for the stable amd64 distribution.
It covers all security updates since the release of sarge, which were missing updated packages for the not yet official amd64 port. Future security advisories will include updates for this port as well.

New dhcpcd packages are available for Slackware 8.1, 9.0, 9.1, 10.0, 10.1, and -current to fix a minor security issue. The dhcpcd daemon can be tricked into reading past the end of the DHCP buffer by a malicious DHCP server, which causes the dhcpcd daemon to crash and results in a denial of service. Of course, a malicious DHCP server could simply give you an IP address that wouldn't work, too, such as 127.0.0.1, but since people have been asking about this issue, here's a fix, and that's the extent of the impact. In other words, very little real impact. Even less detail about this issue may be found in the Common Vulnerabilities and Exposures (CVE) database:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-1848

An updated dhcpcd package that fixes a denial of service issue is now available.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

The dhcpcd package includes a DHCP client daemon.

An out of bounds memory read bug was found in dhcpcd. A malicious user on the local network could send a specially crafted DHCP packet to the client causing it to crash. The Common Vulnerabilities and Exposures project assigned the name CVE-2005-1848 to this issue.

Users of dhcpcd should update to this erratum package, which contains a patch that resolves this issue.

The remote host is affected by the vulnerability described in GLSA-200507-16 (dhcpcd: Denial of Service vulnerability)

    infamous42md discovered that dhcpcd can be tricked to read past     the end of the supplied DHCP buffer. As a result, this might lead to a     crash of the daemon.
  Impact :

    With a malicious DHCP server an attacker could cause a Denial of     Service by crashing the DHCP client.
  Workaround :

    There is no known workaround at this time.

'infamous42md' discovered that the dhcpcd DHCP client could be tricked into reading past the end of the supplied DHCP buffer, which could lead to the daemon crashing.

The updated packages have been patched to address this issue.

'infamous42md' discovered that dhcpcd, a DHCP client for automatically configuring IPv4 networking, can be tricked into reading past the end of the supplied DHCP buffer which could lead to the daemon crashing.

ID	Name	Product	Family	Type	Severity
57528	Debian DSA-773-1 : amd64 - several vulnerabilities	Nessus	Debian Local Security Checks	Local	critical
19864	Slackware 10.0 / 10.1 / 8.1 / 9.0 / 9.1 / current : dhcpcd DoS (SSA:2005-255-01)	Nessus	Slackware Local Security Checks	Local	medium
19331	RHEL 2.1 : dhcpcd (RHSA-2005:603)	Nessus	Red Hat Local Security Checks	Local	medium
19212	GLSA-200507-16 : dhcpcd: Denial of Service vulnerability	Nessus	Gentoo Local Security Checks	Local	medium
19191	Mandrake Linux Security Advisory : dhcpcd (MDKSA-2005:117)	Nessus	Mandriva Local Security Checks	Local	medium
18665	Debian DSA-750-1 : dhcpcd - out-of-bound memory access	Nessus	Debian Local Security Checks	Local	medium

Detections

Analytics

CVE-2005-1848

high

Tenable Plugins

critical

medium

medium

medium

medium

medium