Squid Web Proxy Cache SNMP asn_parse_header denial of service
| squid-snmp-asnparseheader-dos (17688) |  Low 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:
- Conectiva Linux Security Announcement CLSA-2004:882: Fixes for squid vulnerabilities.
- iDEFENSE Security Advisory 10.11.04: Squid Web Proxy Cache Remote Denial of Service Vulnerability.
- Squid Web Proxy Cache Web site: Squid Web Proxy Cache.
- Trustix Secure Linux Security Advisory #2004-0054: Multiple security vulnerabilities.
- BID-11385: Squid Proxy SNMP ASN.1 Parser Denial Of Service Vulnerability
- CVE-2004-0918: The asn_parse_header function (asn1.c) in the SNMP module for Squid Web Proxy Cache before 2.4.STABLE7 allows remote attackers to cause a denial of service (server restart) via certain SNMP packets with negative length fields that trigger a memory allocation error.
- DSA-576: squid -- several vulnerabilities
- GLSA-200410-15: Squid: Remote DoS vulnerability
- MDKSA-2004:112: Updated squid packages fix SNMP processing vulnerability
- OpenPKG-SA-2004.048: Squid
- RHSA-2004-591: squid security update
- SUSE-SA:2004:039: xpdf gpdf kdegraphics3-pdf pdftohtml cups: remote system compromise
- SUSE-SR:2008:014: [security-announce] SUSE Security Summary Report SUSE-SR:2008:014
- USN-19-1: squid vulnerabilities
- VUPEN/ADV-2008-1969: Squid SNMP ASN1 Parser Remote Denial of Service Vulnerability
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 AMD64
- MandrakeSoft Mandrake Linux 10.0
- MandrakeSoft Mandrake Linux 10.1 X86_64
- MandrakeSoft Mandrake Linux 10.1
- MandrakeSoft Mandrake Linux 9.2
- MandrakeSoft Mandrake Linux 9.2 AMD64
- 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 AS
- RedHat Enterprise Linux 2.1 ES
- RedHat Enterprise Linux 2.1 AW
- RedHat Enterprise Linux 3 Desktop
- RedHat Enterprise Linux 3 AS
- RedHat Enterprise Linux 3 ES
- RedHat Enterprise Linux 3 WS
- 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
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