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CVE-2013-2503

5.8 · MEDIUM

Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers in the client-server data stream, which makes it easier for remote HTTP servers to spoof the intend…

Published Mar 11, 2013privoxyCWE-20EPSS 4.63%

Overview

CVE-2013-2503 is a medium-severity vulnerability affecting privoxy privoxy. It was published on March 11, 2013 and has a CVSS 2.0 base score of 5.8 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers in the client-server data stream, which makes it easier for remote HTTP servers to spoof the intended proxy service via a 407 (aka Proxy Authentication Required) HTTP status code.

Remediation

Check the references section for vendor advisories and patches from privoxy. Update privoxy to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
privoxyprivoxy0Affected

References

Refblog.c22.cc/2013/03/11/privoxy-proxy-authentication-credential-exposure-cve-2013-2503/Refijbswa.cvs.sourceforge.net/viewvc/ijbswa/current/ChangeLog?revision=1.188&view=markupReflists.opensuse.org/opensuse-updates/2013-03/msg00118.htmlRefblog.c22.cc/2013/03/11/privoxy-proxy-authentication-credential-exposure-cve-2013-2503/Refijbswa.cvs.sourceforge.net/viewvc/ijbswa/current/ChangeLog?revision=1.188&view=markupReflists.opensuse.org/opensuse-updates/2013-03/msg00118.html

How CyberStrike helps

Frequently asked questions

What is CVE-2013-2503?

CVE-2013-2503 is a medium-severity vulnerability affecting privoxy privoxy. It was published on March 11, 2013 and has a CVSS 2.0 base score of 5.8 (MEDIUM).

How severe is CVE-2013-2503?

This vulnerability has a CVSS 2.0 base score of 5.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2013-2503?

Check the references section for vendor advisories and patches from privoxy. Update privoxy to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2013-2503?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-2503 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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