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Fencer Vulns
critical 10.0

CVE-2004-0541 in the critical feed json

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 hand…

published 2004-06-10 22 y ago modified 2026-06-16 4 mo ago also EUVD-2004-0540

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
71.1%
EPSS 71.1% chance of exploitation in 30 days, percentile 99.4%
public exploits
3
Metasploit, Exploit-DB

Summary

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).

Patch / fix

  • squid Debian 14, Debian 13, Debian 12 2.5.5-5

debian advisories DEBIAN-CVE-2004-0541

  • squid RHEL 3 7:2.5.STABLE3-6.3E

red hat advisories RHSA-2004:242

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2004-0541 updated

security flaw

  • Red Hat Desktop version 3 squid 2.5.STABLE3-6.3E Red Hat Enterprise Linux AS version 3 squid 2.5.STABLE3-6.3E Red Hat Enterprise Linux ES version 3 squid 2.5.STABLE3-6.3E Red Hat Enterprise Linux WS version 3 squid 2.5.STABLE3-6.3E
    fixed: vendor fix RHSA-2004:242

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (Metasploit exploit/linux/proxy/squid_ntlm_authenticate)
  2. Published

Exploit prediction

71.07% chance of exploitation in the next 30 days, higher than 99.4% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.