| Name | CVE-2018-11763 |
| Description | In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time without any connection timeout coming to effect. This affects only HTTP/2 connections. A possible mitigation is to not enable the h2 protocol. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 909591 |
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 | stretch | 2.4.25-3+deb9u6 | | | |
| apache2 | source | (unstable) | 2.4.35-1 | | | 909591 |
Notes
[jessie] - apache2 <not-affected> (Vulnerable code not present)
HTTP/2 support introduced in 2.4.17
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2018-11763
[wheezy] - apache2 <not-affected> (HTTP/2 support was first introduced in version 2.4.17)