CVE-2016-1546

NameCVE-2016-1546
DescriptionThe Apache HTTP Server 2.4.17 and 2.4.18, when mod_http2 is enabled, does not limit the number of simultaneous stream workers for a single HTTP/2 connection, which allows remote attackers to cause a denial of service (stream-processing outage) via modified flow-control windows.
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)
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
apache2 (PTS)jessie (security), jessie2.4.10-10+deb8u12fixed
stretch2.4.25-3+deb9u6fixed
stretch (security)2.4.25-3+deb9u4fixed
buster, sid2.4.37-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
apache2source(unstable)2.4.20-1medium
apache2sourcejessie(not affected)
apache2sourcewheezy(not affected)

Notes

[jessie] - apache2 <not-affected> (Vulnerable code not present)
[wheezy] - apache2 <not-affected> (Vulnerable code not present)
HTTP/2 support introduced in 2.4.17
Upstream commit: http://svn.apache.org/viewvc?view=revision&revision=1733727
Upsteam backport for 2.4.x: http://svn.apache.org/viewvc?view=revision&revision=1734413

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