PublicDateAtUSN: 2021-06-10 07:15:00 UTC
Candidate: CVE-2020-13950
PublicDate: 2021-06-10 07:15:00 UTC
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
Description:
 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
Ubuntu-Description:
Notes:
 mdeslaur> need to check if bionic is vulnerable as it is older than 2.4.41
 mdeslaur> included in same backport commit as CVE-2019-17567
 mdeslaur> looks like it was introduced by:
 mdeslaur> https://svn.apache.org/viewvc?view=revision&revision=1656259
Mitigation:
Bugs:
Priority: low
Discovered-by: Marc Stern
Assigned-to: mdeslaur
CVSS:
 nvd: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H [7.5 HIGH]


Patches_apache2:
 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)
upstream_apache2: released (2.4.46-6)
trusty_apache2: ignored (out of standard support)
trusty/esm_apache2: not-affected (code not present)
xenial_apache2: ignored (out of standard support)
esm-infra/xenial_apache2: not-affected (code not present)
bionic_apache2: not-affected (code not present)
focal_apache2: released (2.4.41-4ubuntu3.3)
groovy_apache2: released (2.4.46-1ubuntu1.2)
hirsute_apache2: released (2.4.46-4ubuntu1.1)
impish_apache2: released (2.4.46-4ubuntu2)
jammy_apache2: released (2.4.46-4ubuntu2)
devel_apache2: released (2.4.46-4ubuntu2)