CVE-2012-4504

CVE-2012-4504 is a critical-severity vulnerability in Libproxy Project Libproxy with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2012-4504?
CVE-2012-4504 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2012-4504 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-4504?
CVE-2012-4504 primarily affects Libproxy Project Libproxy. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-4504?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2012-4504 published?
CVE-2012-4504 was published on 2012-11-11 and last updated on 2026-06-16.

References

Affected products (8)

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