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Apache HTTP Server versions 2.4.20 to 2.4.43 When trace...

Moderate severity Unreviewed Published May 24, 2022 to the GitHub Advisory Database • Updated May 1, 2025

Package

No package listed— Suggest a package

Affected versions

Unknown

Patched versions

Unknown

Description

Apache HTTP Server versions 2.4.20 to 2.4.43 When trace/debug was enabled for the HTTP/2 module and on certain traffic edge patterns, logging statements were made on the wrong connection, causing concurrent use of memory pools. Configuring the LogLevel of mod_http2 above "info" will mitigate this vulnerability for unpatched servers.

References

Published by the National Vulnerability Database Aug 7, 2020
Published to the GitHub Advisory Database May 24, 2022
Last updated May 1, 2025

Severity

Moderate

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(97th percentile)

Weaknesses

CVE ID

CVE-2020-11993

GHSA ID

GHSA-89mq-r3q6-9q3q

Source code

No known source code

Dependabot alerts are not supported on this advisory because it does not have a package from a supported ecosystem with an affected and fixed version.

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