CVE-2012-4504

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.

Published: 2012-11-11 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-4504 is rated High Risk (68/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 5.63%). High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2012-4504

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 8.92% 5.63% -3.29%
2 2025-03-29 5.63% 8.92% +3.29%
3 2025-03-17 — 5.63% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-4504

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2012-4504

OS Trackers for CVE-2012-4504

vendor priority summary link
debian unimportant CVE-2012-4504 unimportant priority: Debian including 1 source packages (libproxy), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2012-4504
gentoo normal CVE-2012-4504: 1 GLSA(s) (201404-02), 1 atom(s) (net-libs/libproxy); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2012-4504
redhat medium — https://access.redhat.com/security/cve/CVE-2012-4504
suse critical CVE-2012-4504 severity critical: SUSE including 47 source package names (libproxy-devel-0.4.11-11.2, libproxy-devel-0.4.13-16.3, …), 137 product×package rows across 40 product lines (SUSE Linux Enterprise Desktop 12, SUSE Linux Enterprise Desktop 12 SP1, … (40 product lines)): Fixed 137. https://www.suse.com/security/cve/CVE-2012-4504/
ubuntu low CVE-2012-4504 low priority: Ubuntu including 1 source packages (libproxy), 7 status rows across 7 suites (hardy, lucid, natty, oneiric, precise, quantal, upstream): not-affected 3, released 3, DNE 1. https://ubuntu.com/security/CVE-2012-4504

Affected software / configurations for CVE-2012-4504

Vendor Product Version Raw CPE
libproxy_project libproxy 0.4.0 cpe:2.3:a:libproxy_project:libproxy:0.4.0:*:*:*:*:*:*:*
libproxy_project libproxy 0.4.1 cpe:2.3:a:libproxy_project:libproxy:0.4.1:*:*:*:*:*:*:*
libproxy_project libproxy 0.4.2 cpe:2.3:a:libproxy_project:libproxy:0.4.2:*:*:*:*:*:*:*
libproxy_project libproxy 0.4.3 cpe:2.3:a:libproxy_project:libproxy:0.4.3:*:*:*:*:*:*:*
libproxy_project libproxy 0.4.5 cpe:2.3:a:libproxy_project:libproxy:0.4.5:*:*:*:*:*:*:*
libproxy_project libproxy 0.4.6 cpe:2.3:a:libproxy_project:libproxy:0.4.6:*:*:*:*:*:*:*
libproxy_project libproxy 0.4.7 cpe:2.3:a:libproxy_project:libproxy:0.4.7:*:*:*:*:*:*:*
libproxy_project libproxy 0.4.8 cpe:2.3:a:libproxy_project:libproxy:0.4.8:*:*:*:*:*:*:*

References for CVE-2012-4504

cvelogic Threat Intelligence