Squid Proxy NTLM Authentication Buffer Overflow Vulnerability

BID:10500

Info

Squid Proxy NTLM Authentication Buffer Overflow Vulnerability

Bugtraq ID: 10500
Class: Boundary Condition Error
CVE: CVE-2004-0541
Remote: Yes
Local: No
Published: Jun 09 2004 12:00AM
Updated: Nov 15 2007 12:40AM
Credit: The discoverer of this issue wishes to remain anonymous.
Vulnerable: 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
+ 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 2.1 PATCH2
Squid Web Proxy Cache 2.0 PATCH2
SGI ProPack 3.0
Redhat Linux 9.0 i386
Redhat Linux 8.0 i686
Redhat Linux 8.0 i386
Redhat Linux 8.0
Redhat Linux 7.3 i386
Redhat Fedora Core2
Redhat Fedora Core1
Mandriva Linux Mandrake 7.2
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
Not Vulnerable:

Discussion

Squid Proxy NTLM Authentication Buffer Overflow Vulnerability

Squid Web Proxy Cache is reportedly affected by a buffer-overflow vulnerability when processing NTLM authentication credentials. The application fails to properly validate buffer boundaries when copying user-supplied input.

This would allow an attacker to modify stack-based process memory to cause a denial-of-service condition and execute arbitrary code in the context of the vulnerable web proxy. This will most likely facilitate unauthorized access to the affected computer.

Exploit / POC

Squid Proxy NTLM Authentication Buffer Overflow Vulnerability

UPDATE: Core Security Technologies has developed a working commercial exploit for its CORE IMPACT product. This exploit is not otherwise publicly available or known to be circulating in the wild.

An exploit is available for the Metasploit Framework:

Solution / Fix

Squid Proxy NTLM Authentication Buffer Overflow Vulnerability

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


Squid Web Proxy Cache 2.4

Squid Web Proxy Cache 2.5 .STABLE4

Squid Web Proxy Cache 2.5 .STABLE1

Squid Web Proxy Cache 2.5 .STABLE3

Squid Web Proxy Cache 2.5 .STABLE5

SGI ProPack 3.0

References

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