ISC DHCP daemon NSUPDATE logging format string

dhcpd-nsupdate-format-string (9039) The risk level is classified as HighHigh Risk

Description:

Internet Software Consortium (ISC) Dynamic Host Configuration Protocol (DHCP) daemon is vulnerable to a format string attack that could allow a remote attacker to gain root privileges on the system. The NSUPDATE option that is installed with DHCPD by default returns a DNS (Domain Name System) update request after processing a DHCP request. Once the request is received by the DNS server, a response is returned, which is logged by the DHCP server. A remote attacker could supply a malicious format string as part of the hostname in the DNS response, which could allow the attacker to execute arbitrary code on the system with root privileges, once the response is logged.


Consequences:

Gain Access

Remedy:

Upgrade to the latest version of DHCP (3.0p1 or later), available from the Internet Software Consortium Web site. See References.

For Conectiva Linux 8.0:
Upgrade to the latest version of DHCP (3.0-3U8_1cl or later), as listed in Conectiva Linux Security Announcement CLSA-2002:483. See References.

For Mandrake Linux 7.2:
Upgrade to the latest version of DHCP (3.0b2pl9-4.1mdk or later), as listed in MandrakeSoft Security Advisory MDKSA-2002:037 : dhcp. See References.

For Mandrake Linux Single Network Firewall 7.2:
Upgrade to the latest version of DHCP (3.0b2pl23-2.1mdk or later), as listed in MandrakeSoft Security Advisory MDKSA-2002:037 : dhcp. See References.

For Mandrake Linux 8.1:
Upgrade to the latest version of DHCP (3.0-0.rc12.2.1mdk or later), as listed in MandrakeSoft Security Advisory MDKSA-2002:037 : dhcp. See References.

For Mandrake Linux 8.2:
Upgrade to the latest version of DHCP (3.0-1rc8.2.1mdk or later), as listed in MandrakeSoft Security Advisory MDKSA-2002:037 : dhcp. See References.

For SuSE Linux 8.0 (Intel):
Uprade to the latest DHCP package (3.0.1rc6-8 or later), as listed in SuSE Security Announcement SuSE-SA:2002:019. See References.

For SuSE Linux 7.3 (Intel):
Uprade to the latest DHCP package (3.0rc12-47 or later), as listed in SuSE Security Announcement SuSE-SA:2002:019. See References.

For SuSE Linux 7.2 (Intel):
Uprade to the latest DHCP package (3.0rc4-27 or later), as listed in SuSE Security Announcement SuSE-SA:2002:019. See References.

For SuSE Linux 7.3 (Sparc):
Uprade to the latest DHCP package (3.0rc12-22 or later), as listed in SuSE Security Announcement SuSE-SA:2002:019. See References.

For SuSE Linux 7.3 (PPC Power PC ):
Uprade to the latest DHCP package (3.0rc12-32 or later), as listed in SuSE Security Announcement SuSE-SA:2002:019. See References.

For Caldera OpenLinux Server and Workstation 3.1 and 3.1.1
Upgrade to the latest dhcp package (3.0b2pl9-11or later) as listed in Caldera Systems, Inc. Security Advisory CSSA-2002-028.0. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

Platforms Affected:

  • Conectiva Linux 8.0
  • ISC DHCPd 3.0
  • ISC DHCPd 3.0.1 rc6
  • ISC DHCPd 3.0.1 rc5
  • ISC DHCPd 3.0.1 rc7
  • ISC DHCPd 3.0.1 rc8
  • ISC DHCPd 3.0.1 rc4
  • ISC DHCPd 3.0.1 rc1
  • ISC DHCPd 3.0.1 rc2
  • ISC DHCPd 3.0.1 rc3
  • MandrakeSoft Mandrake Linux 7.2
  • MandrakeSoft Mandrake Linux 8.1
  • MandrakeSoft Mandrake Linux 8.2
  • MandrakeSoft Mandrake Single Network Firewall 7.2
  • SCO Caldera OpenLinux Server 3.1
  • SCO Caldera OpenLinux Server 3.1.1
  • SCO Caldera OpenLinux Workstation 3.1
  • SCO Caldera OpenLinux Workstation 3.1.1
  • SuSE SuSE eMail Server III
  • SUSE SuSE Linux 7.2
  • SUSE SuSE Linux 7.3
  • SUSE SuSE Linux 8.0
  • SuSE SuSE Linux Connectivity Server
  • SuSE SuSE Linux Database Server
  • SuSE SuSE Linux Firewall

Reported:

May 08, 2002

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