| Name | CVE-2016-4979 |
| Description | The Apache HTTP Server 2.4.18 through 2.4.20, when mod_http2 and mod_ssl are enabled, does not properly recognize the "SSLVerifyClient require" directive for HTTP/2 request authorization, which allows remote attackers to bypass intended access restrictions by leveraging the ability to send multiple requests over a single connection and aborting a renegotiation. |
| 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) | buster | 2.4.38-3+deb10u8 | fixed |
| buster (security) | 2.4.38-3+deb10u10 | fixed |
| bullseye | 2.4.56-1~deb11u2 | fixed |
| bullseye (security) | 2.4.56-1~deb11u1 | fixed |
| bookworm | 2.4.57-2 | fixed |
| sid, trixie | 2.4.58-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| apache2 | source | wheezy | (not affected) | | | |
| apache2 | source | jessie | (not affected) | | | |
| apache2 | source | (unstable) | 2.4.23-1 | | | |
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 fix: https://svn.apache.org/r1750779