Squid Proxy SNMP ASN.1 Parser Denial Of Service Vulnerability

BID:11385

Info

Squid Proxy SNMP ASN.1 Parser Denial Of Service Vulnerability

Bugtraq ID: 11385
Class: Failure to Handle Exceptional Conditions
CVE: CVE-2004-0918
Remote: Yes
Local: No
Published: Oct 12 2004 12:00AM
Updated: Apr 13 2015 09:51PM
Credit: iDEFENSE disclosed this vulnerability, but the original discoverer wishes to remain anonymous.
Vulnerable: Ubuntu Ubuntu Linux 4.1 ppc
Ubuntu Ubuntu Linux 4.1 ia64
Ubuntu Ubuntu Linux 4.1 ia32
Trustix Secure Linux 2.1
Trustix Secure Linux 2.0
Trustix Secure Linux 1.5
Trustix Secure Enterprise Linux 2.0
Squid Web Proxy Cache 3.0 PRE3
Squid Web Proxy Cache 3.0 PRE2
Squid Web Proxy Cache 3.0 PRE1
Squid Web Proxy Cache 3.0
Squid Web Proxy Cache 2.5 .STABLE6
+ Mandriva Linux Mandrake 10.1 x86_64
 + S.u.S.E. Linux Personal 9.2 x86_64
 + S.u.S.E. Linux Personal 9.2
+ Turbolinux Appliance Server 1.0 Workgroup Edition
 + Turbolinux Appliance Server 1.0 Hosting Edition
 + Turbolinux Appliance Server Hosting Edition 1.0
+ Turbolinux Appliance Server Workgroup Edition 1.0
+ Turbolinux Turbolinux Server 10.0
+ Turbolinux Turbolinux Server 8.0
+ Turbolinux Turbolinux Server 7.0
+ Turbolinux Turbolinux Workstation 8.0
+ Turbolinux Turbolinux Workstation 7.0
Squid Web Proxy Cache 2.5 .STABLE5
+ S.u.S.E. Linux Personal 9.1 x86_64
 + S.u.S.E. Linux Personal 9.1
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
+ Ubuntu Ubuntu Linux 4.1 ppc
 + Ubuntu Ubuntu Linux 4.1 ia64
 + Ubuntu Ubuntu Linux 4.1 ia32
 Squid Web Proxy Cache 2.5 .STABLE4
+ MandrakeSoft Corporate Server 3.0
+ Mandriva Linux Mandrake 10.0 AMD64
 + Mandriva Linux Mandrake 10.0
+ OpenPKG OpenPKG 2.0
+ OpenPKG OpenPKG Current
 Squid Web Proxy Cache 2.5 .STABLE3
+ Mandriva Linux Mandrake 9.2 amd64
 + Mandriva Linux Mandrake 9.2
+ OpenPKG OpenPKG 1.3
+ Redhat Desktop 3.0
+ Redhat Enterprise Linux AS 3
 + Redhat Enterprise Linux ES 3
 + Redhat Enterprise Linux WS 3
 + Redhat Fedora Core1
 + S.u.S.E. Linux Personal 9.0 x86_64
 + S.u.S.E. Linux Personal 9.0
Squid Web Proxy Cache 2.5 .STABLE1
+ Mandriva Linux Mandrake 9.1 ppc
 + Mandriva Linux Mandrake 9.1
+ S.u.S.E. Linux Personal 8.2
Squid Web Proxy Cache 2.4 .STABLE7
+ MandrakeSoft Corporate Server 2.1 x86_64
 + MandrakeSoft Corporate Server 2.1
+ MandrakeSoft Multi Network Firewall 2.0
+ Redhat Enterprise Linux AS 2.1 IA64
 + Redhat Enterprise Linux AS 2.1
 + Redhat Enterprise Linux ES 2.1 IA64
 + Redhat Enterprise Linux ES 2.1
 + Redhat Enterprise Linux WS 2.1 IA64
 + Redhat Enterprise Linux WS 2.1
 + Redhat Linux Advanced Work Station 2.1
Squid Web Proxy Cache 2.4 .STABLE6
+ Debian Linux 3.0 sparc
 + Debian Linux 3.0 s/390
 + Debian Linux 3.0 ppc
 + Debian Linux 3.0 mipsel
 + Debian Linux 3.0 mips
 + Debian Linux 3.0 m68k
 + Debian Linux 3.0 ia-64
 + Debian Linux 3.0 ia-32
 + Debian Linux 3.0 hppa
 + Debian Linux 3.0 arm
 + Debian Linux 3.0 alpha
 + Debian Linux 3.0
Squid Web Proxy Cache 2.4 .STABLE2
Squid Web Proxy Cache 2.4
+ Debian Linux 3.0 sparc
 + Debian Linux 3.0 s/390
 + Debian Linux 3.0 ppc
 + Debian Linux 3.0 mipsel
 + Debian Linux 3.0 mips
 + Debian Linux 3.0 m68k
 + Debian Linux 3.0 ia-64
 + Debian Linux 3.0 ia-32
 + Debian Linux 3.0 hppa
 + Debian Linux 3.0 arm
 + Debian Linux 3.0 alpha
 + Debian Linux 3.0
Squid Web Proxy Cache 2.3 .STABLE5
Squid Web Proxy Cache 2.3 .STABLE4
Squid Web Proxy Cache 2.1 PATCH2
Squid Web Proxy Cache 2.0 PATCH2
Squid Web Proxy Cache 3.0.STABLE6
Squid Web Proxy Cache 3.0.STABLE5
Squid Web Proxy Cache 3.0.STABLE4
Squid Web Proxy Cache 3.0.STABLE3
Squid Web Proxy Cache 3.0.STABLE2
Squid Web Proxy Cache 3.0.STABLE1
SCO Unixware 7.1.4
S.u.S.E. openSUSE 11.0
Redhat Linux 9.0 i386
Redhat Linux 7.3 i386
Redhat Fedora Core2
Redhat Fedora Core1
OpenPKG OpenPKG 2.2
OpenPKG OpenPKG 2.1
OpenPKG OpenPKG Current
Gentoo Linux
Not Vulnerable: Squid Web Proxy Cache 2.5 .STABLE7
+ Gentoo Linux
+ Redhat Fedora Core3
 + Redhat Fedora Core2
 Squid Web Proxy Cache 3.0.STABLE7

Discussion

Squid Proxy SNMP ASN.1 Parser Denial Of Service Vulnerability

Squid is prone to a denial-of-service vulnerability in its SNMP ASN.1 parser. SNMP support is not enabled by default as provided by the vendor, but may be enabled by default when Squid is included as a binary application in certain unconfirmed operating systems.

This vulnerability allows remote attackers to crash affected Squid proxies with single UDP datagrams that may be spoofed. Squid will attempt to restart itself automatically, but an attacker sending repeated malicious SNMP packets can effectively deny service to legitimate users.

Squid 2.5-STABLE6 and earlier, as well as 3.0-PRE3-20040702, are reported vulnerable.

Exploit / POC

Squid Proxy SNMP ASN.1 Parser Denial Of Service Vulnerability

An exploit is not required.

Solution / Fix

Squid Proxy SNMP ASN.1 Parser Denial Of Service Vulnerability

Solution:
Please see the referenced vendor advisories for more information and fixes.

UPDATE (June 27, 2008): iDefense Labs recently discovered that Squid 3.0 to 3.0.STABLE6 are also vulnerable. The vendor released 3.0.STABLE7 to address the issue. Please see the references for more information.


Squid Web Proxy Cache 3.0.STABLE5

Squid Web Proxy Cache 3.0.STABLE2

Squid Web Proxy Cache 3.0.STABLE3

Squid Web Proxy Cache 3.0.STABLE4

Squid Web Proxy Cache 3.0.STABLE6

Squid Web Proxy Cache 3.0.STABLE1

Squid Web Proxy Cache 2.0 PATCH2

Squid Web Proxy Cache 2.1 PATCH2

Squid Web Proxy Cache 2.3 .STABLE4

Squid Web Proxy Cache 2.3 .STABLE5

Squid Web Proxy Cache 2.4 .STABLE7

Squid Web Proxy Cache 2.4 .STABLE6

Squid Web Proxy Cache 2.4

Squid Web Proxy Cache 2.4 .STABLE2

Squid Web Proxy Cache 2.5 .STABLE4

Squid Web Proxy Cache 2.5 .STABLE6

Squid Web Proxy Cache 2.5 .STABLE1

Squid Web Proxy Cache 2.5 .STABLE3

Squid Web Proxy Cache 2.5 .STABLE5

Squid Web Proxy Cache 3.0 PRE2

Squid Web Proxy Cache 3.0 PRE3

Squid Web Proxy Cache 3.0 PRE1

Squid Web Proxy Cache 3.0

SCO Unixware 7.1.4

References

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