CVE-2012-4557

Name: CVE-2012-4557
Creator: NVD / NIST
Published: 2012-11-30T19:55:01.05+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 17.47%

Last modified Jun 16, 2026

CVE-2012-4557 is a vulnerability of currently unknown severity. The mod_proxy_ajp module in the Apache HTTP Server 2.2.12 through 2.2.21 places a worker node into an error state upon detection of a long request-processing time, which allows remote attackers to cause a denial of service (worker consumption) via an expensive request.. EPSS estimates a 17.47% chance of exploitation in the next 30 days.

Description

The mod_proxy_ajp module in the Apache HTTP Server 2.2.12 through 2.2.21 places a worker node into an error state upon detection of a long request-processing time, which allows remote attackers to cause a denial of service (worker consumption) via an expensive request.

Metrics

EPSS Probability

17.47%

96.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-399

Affected Software

Vendor	Product	Versions
Apache	Http Server	2.2.12
Apache	Http Server	2.2.13
Apache	Http Server	2.2.14
Apache	Http Server	2.2.15
Apache	Http Server	2.2.16
Apache	Http Server	2.2.17
Apache	Http Server	2.2.18
Apache	Http Server	2.2.19
Apache	Http Server	2.2.20
Apache	Http Server	2.2.21

References

Timeline

Published: Nov 30, 2012
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2012-4557?

How severe is CVE-2012-4557?

Severity scoring for CVE-2012-4557 is pending analysis. The EPSS model estimates a 17.47% probability of exploitation in the next 30 days.

How do I fix CVE-2012-4557?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2012-4557?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST