Squid Web Proxy Cache SNMP asn_parse_header denial of service

squid-snmp-asnparseheader-dos (17688) The risk level is classified as MediumMedium Risk

Description:

Squid Web Proxy Cache is vulnerable to a denial of service attack, caused by a ASN1 parsing vulnerability in the SNMP module. The asn_parse_header function in the snmplib/asn1.c file improperly validates negative length fields. By sending a specially-crafted UDP packet, a remote attacker could cause the server to crash.


Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of Squid (2.5.STABLE7 or later), available from the Squid Web Proxy Cache Web site. See References.

—OR—

For Squid-2.5.STABLE6:
Apply the SNMP_core_dump patch, available from the Squid Web Proxy Cache Web site. See References.

For Trustix Secure Linux:
Upgrade to the latest Squid package, as listed in Trustix Secure Linux Security Advisory #2004-0054 for more information. See References.

For Gentoo Linux:
Upgrade to the latest version of squid (2.5.7 or later), as listed in GLSA 200410-15. See References.

For Red Hat Linux:
Upgrade to the latest squid package, as listed below. Refer to RHSA-2004:591-04 for more information. See References.

Red Hat Enterprise Linux AS (v. 2.1), ES (v. 2.1), and Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor: 2.4.STABLE7-1.21as or later

Red Hat Enterprise Linux AS (v. 3), ES (v. 3), WS (v. 3), Desktop: 2.5.STABLE3-6.3E.2.x86_64 or later

For Mandrake Linux:
Upgrade to the latest squid package, as listed below. Refer to MandrakeSoft Security Advisory MDKSA-2004:112 for more information. See References.

Mandrake Linux 9.2: 2.5.STABLE3-3.4.92mdk or later
Mandrake Linux Multi Network Firewall 8.2: 2.4.STABLE7-1.3.M82mdk or later
Mandrake Linux Corporate Server 2.1: 2.4.STABLE7-2.2.C21mdk or later
Mandrake Linux 10.0: 2.5.STABLE4-2.2.100mdk or later

For Debian GNU/Linux 3.0 (alias woody):
Upgrade to the latest squid package (2.4.6-2woody4 or later), as listed in DSA-576-1. See References.

For OpenPKG:
Upgrade to the latest squid package, as listed in OpenPKG Security Advisory OpenPKG-SA-2004.048. See References.

OpenPKG CURRENT: 2.5.7-20041012 or later
OpenPKG 2.1: 2.5.6-2.1.1 or later

For Conectiva Linux:
Upgrade to the latest squid package, as listed below. Refer to Conectiva Linux Security Announcement CLSA-2004:882 for more information. See References.

Conectiva Linux 10.0: 2.5.5-63116U10_4cl or later
Conectiva Linux 9: 2.5.5-25761U90_7cl or later

For Ubuntu Linux:
Upgrade to the latest squid package (2.5.5-6ubuntu0.2 or later), as listed in USN-19-1 November 06, 2004. See References.

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

References:

Platforms Affected:

  • Canonical Ubuntu 4.10
  • Conectiva Linux 10
  • Conectiva Linux 9.0
  • Debian Debian Linux 3.0
  • Gentoo Linux
  • MandrakeSoft Mandrake Linux 10.0
  • MandrakeSoft Mandrake Linux 10.0 AMD64
  • MandrakeSoft Mandrake Linux 10.1
  • MandrakeSoft Mandrake Linux 10.1 X86_64
  • MandrakeSoft Mandrake Linux 9.2 AMD64
  • MandrakeSoft Mandrake Linux 9.2
  • MandrakeSoft Mandrake Linux Corporate Server 2.1 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 2.1
  • MandrakeSoft Mandrake Multi Network Firewall 8.2
  • OpenPKG OpenPKG 2.1
  • OpenPKG OpenPKG 2.2
  • OpenPKG OpenPKG CURRENT
  • RedHat Enterprise Linux 2.1 ES
  • RedHat Enterprise Linux 2.1 AS
  • RedHat Enterprise Linux 2.1 AW
  • RedHat Enterprise Linux 3 AS
  • RedHat Enterprise Linux 3 WS
  • RedHat Enterprise Linux 3 Desktop
  • RedHat Enterprise Linux 3 ES
  • RedHat Linux Advanced Workstation 2.1 Itanium
  • Squid-Cache Squid 2.0.PATCH2
  • Squid-Cache Squid 2.1.PATCH2
  • Squid-Cache Squid 2.3 STABLE5
  • Squid-Cache Squid 2.3. STABLE4
  • Squid-Cache Squid 2.4
  • Squid-Cache Squid 2.4.STABLE2
  • Squid-Cache Squid 2.4.STABLE6
  • Squid-Cache Squid 2.4.STABLE7
  • Squid-Cache Squid 2.5 STABLE6
  • Squid-Cache Squid 2.5.STABLE1
  • Squid-Cache Squid 2.5.STABLE3
  • Squid-Cache Squid 2.5.STABLE4
  • Squid-Cache Squid 2.5.STABLE5
  • Squid-Cache Squid 3.0.PRE1
  • Squid-Cache Squid 3.0.PRE2
  • Squid-Cache Squid 3.0.PRE3
  • SuSE Linux Enterprise Server 8
  • SUSE SuSE Linux 8.1
  • SUSE SuSE Linux 8.2
  • SUSE SuSE Linux 9.0
  • SUSE SuSE Linux 9.1
  • SuSE SuSE Linux Desktop 1.0
  • Trustix Secure Linux 2.0
  • Trustix Secure Linux 2.1

Reported:

Oct 11, 2004

The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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