6791 : Squid libntlmssp.c ntlm_check_auth Function NTLM Authentication Helper Password Handling Remote Overflow
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Timeline

Disclosure Date
2004-06-09

Description

A remote overflow exists in the Squid Internet Object Cache server. Squid fails to correctly test the length of the user-supplied LanMan Hash value in the ntlm_check_auth() function in libntlmssp.c resulting in a stack-based buffer overflow. With a specially crafted request, an attacker can execute arbitrary code on the system with the privileges the Squid process is running under. This flaw can only be exploited if Squid was compiled with the NTLM authentication helper enabled.

Classification

Location: Remote / Network Access
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Workaround, Patch / RCS
Exploit: Exploit Public
Disclosure: Vendor Verified

Solution

A patch has been released for this vulnerability available from the Squid website. Additionally, Squid can be recompiled to disable NTLM authentication.

Products

University of California, San Diego
Squid Internet Object Cache
2.5-STABLE5
3.0-PRE3-230040720

References

Tools & Filters

12294 12504 12616 13717 13718 13832 14158 14524

Snort

12362 3-10481
2185

Credit

CVSSv2 Score

CVSSv2 Base Score = 10.0
Source: nvd.nist.gov | Generated: 2003-12-31 | Disagree?

Access_vector_2 Access_complexity_2 Authentication_2 Confidentiality_impact_2 Integrity_impact_2 Availability_impact_2

Comments

No Comments.

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