| Name | CVE-2016-1546 |
| Description | The 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
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+deb8u29 | fixed |
| stretch (security) | 2.4.25-3+deb9u13 | fixed |
| stretch (lts), stretch | 2.4.25-3+deb9u19 | fixed |
| buster, buster (lts) | 2.4.59-1~deb10u4 | fixed |
| buster (security) | 2.4.59-1~deb10u1 | fixed |
| bullseye | 2.4.62-1~deb11u1 | fixed |
| bullseye (security) | 2.4.62-1~deb11u2 | fixed |
| bookworm (security), bookworm | 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 | wheezy | (not affected) | | | |
| apache2 | source | jessie | (not affected) | | | |
| apache2 | source | (unstable) | 2.4.20-1 | | | |
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