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CVE-2004-0541

84
FAUCET Score

CVE-2004-0541 describes a critical buffer overflow vulnerability in Squid Web Proxy Cache versions 2.5.x and 3.x, specifically within the NTLM authentication function when NTLM handlers are enabled. This flaw allows remote, unauthenticated attackers to execute arbitrary code by supplying an excessively long password. With a CVSS score of 10.0, this vulnerability presents a severe risk, enabling full compromise of confidentiality, integrity, and availability. Exploit intelligence confirms the existence of public Metasploit modules, indicating readily available exploit code, and community discussion is notably high, suggesting significant awareness despite no active exploitation being reported in the KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
2.5_stableCPE matchmatch criteria
cpe:2.3:a:national_science_foundation:squid_web_proxy_cache:2.5_stable:*:*:*:*:*:*:*
3_preCPE matchmatch criteria
cpe:2.3:a:national_science_foundation:squid_web_proxy_cache:3_pre:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
71.07%
Probability of exploitation in next 30 days
EPSS Percentile
99.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: Squid NTLM Authenticate Overflow · Jun 8, 2004
ExploitDB: EDB-16847 · Apr 30, 2010
This CVE's current EPSS score of 0.7107 is in the 99th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: squid-7:2.5.STABLE3-6.3E
View patch

Vendor Advisories (1)

redhatCVE-2004-0541Moderate

security flaw

Jun 8, 2004

References

patches.sgi.com / support/free/security/advisories/20040604-01-U.asc
fedoranews.org / updates/FEDORA--.shtml
exchange.xforce.ibmcloud.com / vulnerabilities/16360
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10722
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A980
gentoo.org / security/en/glsa/glsa-200406-13.xml
PatchVendor Advisory
idefense.com / application/poi/display
PatchVendor Advisory
mandrakesecure.net / en/advisories/advisory.php
redhat.com / support/errata/RHSA-2004-242.html
PatchVendor Advisory
securityfocus.com / bid/10500
trustix.net / errata/2004/0033
Vendor Advisory