Squid Proxy NTLM Authentication Denial Of Service Vulnerability

BID:11098

Info

Squid Proxy NTLM Authentication Denial Of Service Vulnerability

Bugtraq ID: 11098
Class: Input Validation Error
CVE: CVE-2004-0832
Remote: Yes
Local: No
Published: Sep 02 2004 12:00AM
Updated: Dec 20 2006 08:53PM
Credit: Marco Ortisi <[email protected]> disclosed this vulnerability to the vendor.
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 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 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
+ 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
Redhat Linux 9.0 i386
Redhat Linux 7.3 i386
Redhat Fedora Core2
Redhat Fedora Core1
Mandriva Linux Mandrake 10.0 AMD64
Mandriva Linux Mandrake 10.0
Mandriva Linux Mandrake 9.2 amd64
Mandriva Linux Mandrake 9.2
Gentoo Linux 1.4
Not Vulnerable:

Discussion

Squid Proxy NTLM Authentication Denial Of Service Vulnerability

Squid is reported to be susceptible to a denial of service vulnerability in its NTLM authentication module.

This vulnerability presents itself when attacker supplied input data is passed to the affected NTLM module without proper sanitization.

This vulnerability allows an attacker to crash the NTLM helper application. Squid will respawn new helper applications, but with a sustained, repeating attack, it is likely that proxy authentication depending on the NTLM helper application would fail. Failure of NTLM authentication would result in the Squid application denying access to legitimate users of the proxy.

Squid versions 2.x and 3.x are all reported to be vulnerable to this issue. A patch is available from the vendor.

Exploit / POC

Squid Proxy NTLM Authentication Denial Of Service Vulnerability

Currently we are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

Solution / Fix

Squid Proxy NTLM Authentication Denial Of Service Vulnerability

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


Squid Web Proxy Cache 2.5 .STABLE6

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

References

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