Stack-based buffer overflow in the url::get_pac function in url.cpp in libproxy 0.4.x…
Priority MEDIUM 49CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
Stack-based buffer overflow in the url::get_pac function in url.cpp in libproxy 0.4.x before 0.4.9 allows remote servers to have an unspecified impact via a large proxy.pac file.
Why it matters now
EPSS 0.03476 89th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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 · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libproxy_project:libproxy:0.4.0:*:*:*:*:*:*:* | 0.4.0 | Vulnerable | Libproxy Project |
| cpe:2.3:a:libproxy_project:libproxy:0.4.1:*:*:*:*:*:*:* | 0.4.1 | Vulnerable | Libproxy Project |
| cpe:2.3:a:libproxy_project:libproxy:0.4.2:*:*:*:*:*:*:* | 0.4.2 | Vulnerable | Libproxy Project |
| cpe:2.3:a:libproxy_project:libproxy:0.4.3:*:*:*:*:*:*:* | 0.4.3 | Vulnerable | Libproxy Project |
| cpe:2.3:a:libproxy_project:libproxy:0.4.5:*:*:*:*:*:*:* | 0.4.5 | Vulnerable | Libproxy Project |
| cpe:2.3:a:libproxy_project:libproxy:0.4.6:*:*:*:*:*:*:* | 0.4.6 | Vulnerable | Libproxy Project |
| cpe:2.3:a:libproxy_project:libproxy:0.4.7:*:*:*:*:*:*:* | 0.4.7 | Vulnerable | Libproxy Project |
| cpe:2.3:a:libproxy_project:libproxy:0.4.8:*:*:*:*:*:*:* | 0.4.8 | Vulnerable | Libproxy Project |
- cpe:2.3:a:libproxy_project:libproxy:0.4.0:*:*:*:*:*:*:* Versions 0.4.0 Vulnerable ·Libproxy Project
- cpe:2.3:a:libproxy_project:libproxy:0.4.1:*:*:*:*:*:*:* Versions 0.4.1 Vulnerable ·Libproxy Project
- cpe:2.3:a:libproxy_project:libproxy:0.4.2:*:*:*:*:*:*:* Versions 0.4.2 Vulnerable ·Libproxy Project
- cpe:2.3:a:libproxy_project:libproxy:0.4.3:*:*:*:*:*:*:* Versions 0.4.3 Vulnerable ·Libproxy Project
- cpe:2.3:a:libproxy_project:libproxy:0.4.5:*:*:*:*:*:*:* Versions 0.4.5 Vulnerable ·Libproxy Project
- cpe:2.3:a:libproxy_project:libproxy:0.4.6:*:*:*:*:*:*:* Versions 0.4.6 Vulnerable ·Libproxy Project
- cpe:2.3:a:libproxy_project:libproxy:0.4.7:*:*:*:*:*:*:* Versions 0.4.7 Vulnerable ·Libproxy Project
- cpe:2.3:a:libproxy_project:libproxy:0.4.8:*:*:*:*:*:*:* Versions 0.4.8 Vulnerable ·Libproxy Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2012-4504
- 2026-10-03 Alias added: GHSA-c5fx-qjrf-p783
References
Advisory 2
Other 5
- https://groups.google.com/forum/?fromgroups=#%21topic/libproxy/VxZ8No7mT0E
- https://bugzilla.redhat.com/show_bug.cgi?id=864417
- [oss-security] 20121012 libproxy PAC downloading buffer overflows
- [oss-security] 20121012 Re: libproxy PAC downloading buffer overflows
- [oss-security] 20121016 Re: libproxy PAC downloading buffer overflows
More Libproxy Project Libproxy vulnerabilities
- TI-2012-03847 Heap-based buffer overflow in the px_pac_reload function in lib/pac.c in libproxy 0.2.x… CVSS 2.0HIGH 10.0
- TI-2020-15989 url.cpp in libproxy through 0.4.15 is prone to a buffer overflow when PAC is enabled, as… CVSS 3.1CRITICAL 9.8
- TI-2020-15460 url::recvline in url.cpp in libproxy 0.4.x through 0.4.15 allows a remote HTTP server to… CVSS 3.1HIGH 7.5
- TI-2012-04695 Format string vulnerability in the print_proxies function in bin/proxy.c in libproxy… CVSS 2.0HIGH 7.5
Sources
- CVE-2012-4504 · CVE Program
- CVE-2012-4504 · NVD
- FIRST EPSS
- GHSA-c5fx-qjrf-p783 · GitHub Advisory Database · CC BY 4.0
- CVE-2012-4504 · Red Hat security data · CC BY 4.0
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