| Name | CVE-2020-11993 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-4757-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| apache2 (PTS) | jessie, jessie (lts) | 2.4.10-10+deb8u25 | fixed |
| stretch (security) | 2.4.25-3+deb9u13 | vulnerable |
| stretch (lts), stretch | 2.4.25-3+deb9u15 | vulnerable |
| buster | 2.4.38-3+deb10u8 | fixed |
| buster (security) | 2.4.38-3+deb10u10 | fixed |
| bullseye | 2.4.56-1~deb11u2 | fixed |
| bullseye (security) | 2.4.59-1~deb11u1 | fixed |
| bookworm | 2.4.57-2 | fixed |
| bookworm (security) | 2.4.59-1~deb12u1 | fixed |
| trixie | 2.4.58-1 | fixed |
| sid | 2.4.59-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| apache2 | source | jessie | (not affected) | | | |
| apache2 | source | buster | 2.4.38-3+deb10u4 | | DSA-4757-1 | |
| apache2 | source | (unstable) | 2.4.46-1 | | | |
Notes
[stretch] - apache2 <ignored> (Too intrusive to backport)
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-11993
https://www.openwall.com/lists/oss-security/2020/08/07/3
https://svn.apache.org/r1879642
https://github.com/apache/httpd/commit/63a0a87efa0925514d15c211b508f6594669888c
[jessie] - apache2 <not-affected> (Vulnerable code introduced later)