CVE-2004-0541

Buffer overflow in the ntlm_check_auth (NTLM authentication) function for Squid Web Proxy Cache 2...

10.0 HighPublic exploitFix available

Buffer overflow in the ntlm_check_auth (NTLM authentication) function for Squid Web Proxy Cache 2.5.x and 3.x, when compiled with NTLM handlers enabled, allows remote attackers to execute arbitrary code via a long password ("pass" variable).

Exploit likelihood

71.1%Down 7.0 points since Feb 4, 2022

What each source reports

NVD Score used 10.0

Record: CVE-2004-0541
CVSS 2.0: 10.0 HighAV:N/AC:L/Au:N/C:C/I:C/A:C
Updated: 2026-11-02

CVE List No score

Record: CVE-2004-0541
Updated: 2026-11-02

EUVDEUVD-2004-0540 No score

Record: EUVD-2004-0540
Updated: 2026-11-03

GitHub AdvisoriesGHSA-c92g-qcfc-4869 No score

Buffer overflow in the ntlm_check_auth (NTLM authentication) function for Squid Web Proxy Cache 2...

Record: GHSA-c92g-qcfc-4869
Updated: 2026-11-02

OSV No score

Record: CVE-2004-0541
Updated: 2026-11-02

OSVDEBIAN-CVE-2004-0541 No score

Record: DEBIAN-CVE-2004-0541
Updated: 2026-11-02

Affected products

national science foundation squid web proxy cache

Affected packages

Affected packages
Package	Affected	Fixed
`squid` Debian:12	before 2.5.5-5	2.5.5-5
`squid` Debian:13	before 2.5.5-5	2.5.5-5
`squid` Debian:14	before 2.5.5-5	2.5.5-5
`squid` Red Hat:enterprise_linux:3::as	before 7:2.5.STABLE3-6.3E	7:2.5.STABLE3-6.3E
`squid-debuginfo` Red Hat:enterprise_linux:3::as	before 7:2.5.STABLE3-6.3E	7:2.5.STABLE3-6.3E
`squid` Red Hat:enterprise_linux:3::desktop	before 7:2.5.STABLE3-6.3E	7:2.5.STABLE3-6.3E
`squid-debuginfo` Red Hat:enterprise_linux:3::desktop	before 7:2.5.STABLE3-6.3E	7:2.5.STABLE3-6.3E
`squid` Red Hat:enterprise_linux:3::es	before 7:2.5.STABLE3-6.3E	7:2.5.STABLE3-6.3E
`squid-debuginfo` Red Hat:enterprise_linux:3::es	before 7:2.5.STABLE3-6.3E	7:2.5.STABLE3-6.3E
`squid` Red Hat:enterprise_linux:3::ws	before 7:2.5.STABLE3-6.3E	7:2.5.STABLE3-6.3E
`squid-debuginfo` Red Hat:enterprise_linux:3::ws	before 7:2.5.STABLE3-6.3E	7:2.5.STABLE3-6.3E

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	Squid - NTLM (Authenticated) Overflow (Metasploit)	2010-04-30
Exploit-DB	Squid 2.5.x/3.x - NTLM Buffer Overflow (Metasploit)	2004-06-08
Metasploit	Squid NTLM Authenticate Overflow	2004-06-08

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, Metasploit, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2004-0541 is a high vulnerability (CVSS 10.0) in National Science Foundation Squid Web Proxy Cache, published June 10, 2004. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 71.1%, the 99th percentile. Fixed in squid 2.5.5-5.

References

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