CVE-2020-9490

NameCVE-2020-9490
DescriptionApache 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-4757-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
apache2 (PTS)stretch (security), stretch2.4.25-3+deb9u9vulnerable
buster2.4.38-3+deb10u3vulnerable
buster (security)2.4.38-3+deb10u4fixed
bullseye, sid2.4.46-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
apache2sourcebuster2.4.38-3+deb10u4DSA-4757-1
apache2source(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

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