CVE-2020-13950
Published: 10 June 2021
Apache HTTP Server versions 2.4.41 to 2.4.46 mod_proxy_http can be made to crash (NULL pointer dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers, leading to a Denial of Service
Notes
| Author | Note |
|---|---|
| mdeslaur | need to check if bionic is vulnerable as it is older than 2.4.41 included in same backport commit as CVE-2019-17567 looks like it was introduced by: https://svn.apache.org/viewvc?view=revision&revision=1656259 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
apache2 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| focal |
Released
(2.4.41-4ubuntu3.3)
|
|
| groovy |
Released
(2.4.46-1ubuntu1.2)
|
|
| hirsute |
Released
(2.4.46-4ubuntu1.1)
|
|
| impish |
Released
(2.4.46-4ubuntu2)
|
|
| jammy |
Released
(2.4.46-4ubuntu2)
|
|
| trusty |
Not vulnerable
(code not present)
|
|
| upstream |
Released
(2.4.46-6)
|
|
| xenial |
Not vulnerable
(code not present)
|
|
|
Patches: upstream: https://svn.apache.org/r1678771 upstream: https://github.com/apache/httpd/commit/8c162db8b65b2193e622b780e8c6516d4265f68b upstream: https://github.com/apache/httpd/commit/fa22b50457c81465b5079dc44c7f1f1cb7431f5d (2.4 backport) |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13950
- https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-13950
- https://lists.apache.org/thread.html/rbe197409ae4a58b629fb792d1aed541ccbbf865121a80e1c5938d223@%3Cannounce.httpd.apache.org%3E
- http://www.openwall.com/lists/oss-security/2021/06/10/4
- https://ubuntu.com/security/notices/USN-4994-1
- NVD
- Launchpad
- Debian