Buffer overflow in the ntlm_check_auth (NTLM authentication) function for Squid Web Proxy…
Priority HIGH 80Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
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).
Why it matters now
EPSS 0.7107 99th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:national_science_foundation:squid_web_proxy_cache:2.5_stable:*:*:*:*:*:*:* | 2.5_stable | Vulnerable | National Science Foundation |
| cpe:2.3:a:national_science_foundation:squid_web_proxy_cache:3_pre:*:*:*:*:*:*:* | 3_pre | Vulnerable | National Science Foundation |
- cpe:2.3:a:national_science_foundation:squid_web_proxy_cache:2.5_stable:*:*:*:*:*:*:* Versions 2.5_stable Vulnerable ·National Science Foundation
- cpe:2.3:a:national_science_foundation:squid_web_proxy_cache:3_pre:*:*:*:*:*:*:* Versions 3_pre Vulnerable ·National Science Foundation
Remediation
Red Hat 1 advisory
- RHSA-2004:242 Released 2004-06-09 · Red Hat rating Moderatesquid security update
- Red Hat Desktop version 3 squid-7:2.5.STABLE3-6.3E, squid-7:2.5.STABLE3-6.3E.i386
- Red Hat Enterprise Linux AS version 3 squid-7:2.5.STABLE3-6.3E, squid-7:2.5.STABLE3-6.3E.i386, squid-7:2.5.STABLE3-6.3E.ia64 +1
- Red Hat Enterprise Linux ES version 3 squid-7:2.5.STABLE3-6.3E, squid-7:2.5.STABLE3-6.3E.i386, squid-7:2.5.STABLE3-6.3E.ia64
- Red Hat Enterprise Linux WS version 3 squid-7:2.5.STABLE3-6.3E, squid-7:2.5.STABLE3-6.3E.i386, squid-7:2.5.STABLE3-6.3E.ia64
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Desktop version 3 | Fixed | RHSA-2004:242 |
| Red Hat Enterprise Linux AS version 3 | Fixed | RHSA-2004:242 |
| Red Hat Enterprise Linux ES version 3 | Fixed | RHSA-2004:242 |
| Red Hat Enterprise Linux WS version 3 | Fixed | RHSA-2004:242 |
Timeline
- 2026-10-02 Threatist record created from CVE-2004-0541
- 2026-10-03 Alias added: GHSA-c92g-qcfc-4869
References
More National Science Foundation Squid Web Proxy Cache vulnerabilities
- TI-2004-02350 Squid Web Proxy Cache 2.3.STABLE5 allows remote attackers to bypass security controls and… CVSS 2.0MEDIUM 5.0
- TI-2004-02349 Squid Web Proxy Cache 2.5 might allow remote attackers to obtain sensitive information… CVSS 2.0MEDIUM 5.0
Sources
- CVE-2004-0541 · CVE Program
- CVE-2004-0541 · NVD
- FIRST EPSS
- GHSA-c92g-qcfc-4869 · GitHub Advisory Database · CC BY 4.0
- CVE-2004-0541 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences