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


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.


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


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


University of California, San Diego
Squid Internet Object Cache


Tools & Filters

12294 12504 12616 13717 13718 13832 14158 14524


12362 3-10481


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


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