| Name | CVE-2020-9490 |
| Description | Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via "H2Push off" 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) | bullseye | 2.4.62-1~deb11u1 | fixed |
| bullseye (security) | 2.4.62-1~deb11u2 | fixed |
| bookworm, bookworm (security) | 2.4.62-1~deb12u2 | fixed |
| sid, trixie | 2.4.62-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| 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-2020-9490
https://www.openwall.com/lists/oss-security/2020/08/07/4
https://svn.apache.org/r1880396
https://github.com/apache/httpd/commit/a61223e9cb906110f35ec144b93fee9eb80ad6e4
https://bugs.chromium.org/p/project-zero/issues/detail?id=2030