PT-2006-4019 · Isc · Isc Dhcp

Andrew Steets + 1 · Published 2006-08-09 · Updated 2011-06-13 · CVE-2006-3122

Positive Technologies (AI Summary)

CVSS v2.0

5.0

Medium

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Name of the Vulnerable Software and Affected Versions ISC DHCP (dhcpd) server version 2.0pl5

Description The issue allows remote attackers to cause a denial of service, resulting in an application crash. This is achieved by sending a DHCPDISCOVER packet with a 32 byte client-identifier, which is interpreted as a corrupt uid, causing the server to exit with a "corrupt lease uid" error.

Recommendations For ISC DHCP (dhcpd) server version 2.0pl5, consider restricting access to the supersede lease function in memory.c until a patch is available. As a temporary workaround, avoid using client-identifiers of 32 bytes in DHCPDISCOVER packets to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Weakness Enumeration

CWE-399

Related Identifiers

CVE-2006-3122

DSA-1143-1

Affected Products

Isc Dhcp

References · 10

• http://secunia.com/advisories/21345 · Vendor Advisory
• http://secunia.com/advisories/21363 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2006-3122 · Security Note
• http://vupen.com/english/advisories/2006/3158 · Vendor Advisory
• http://openbsd.org/errata.html#dhcpd · Vendor Advisory
• http://securityfocus.com/bid/19348 · Note
• http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=380273 · Note
• http://securitytracker.com/id?1016755 · Note
• http://secunia.com/advisories/21655 · Note
• http://debian.org/security/2006/dsa-1143 · Patch, Vendor Advisory