CVE-2021-44224
Published: 20 December 2021
A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).
Notes
| Author | Note |
|---|---|
| mdeslaur | fixed by r1895955+r1896044 in 2.4.x |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
apache2 Launchpad, Ubuntu, Debian |
bionic |
Released
(2.4.29-1ubuntu4.21)
|
| focal |
Released
(2.4.41-4ubuntu3.9)
|
|
| hirsute |
Released
(2.4.46-4ubuntu1.5)
|
|
| impish |
Released
(2.4.48-3.1ubuntu3.2)
|
|
| jammy |
Released
(2.4.52-1ubuntu1)
|
|
| trusty |
Released
(2.4.7-1ubuntu4.22+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(2.4.52)
|
|
| xenial |
Released
(2.4.18-2ubuntu3.17+esm4)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
|
Patches: upstream: https://svn.apache.org/viewvc?view=revision&revision=1895955 upstream: https://svn.apache.org/viewvc?view=revision&revision=1896044 upstream: https://github.com/apache/httpd/commit/a962ba73047b5478d702c8ad09fd1a167e1d3736 upstream: https://github.com/apache/httpd/commit/a0521d289ae14e4ac004811dc1ef91b3e118a2f6 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.2 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | Low |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |