Bug 1966738 (CVE-2020-13950)

Summary:	CVE-2020-13950 httpd: mod_proxy NULL pointer dereference
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	aboyko, anon.amish, asoldano, atangrin, bbaranow, bmaxwell, brian.stansberry, caswilli, cdewolf, chazlett, csutherl, darran.lofthouse, dkreling, dosoudil, eleandro, fjuma, gzaronik, hhorak, iweiss, jclere, jkaluza, jochrist, jorton, jpallich, jperkins, jwon, kaycoth, krathod, kwills, lakagwu, lgao, luhliari, msochure, msvehla, mturk, nwallace, pahan, pjindal, pmackay, rguimara, rstancel, rsvoboda, security-response-team, smaestri, szappis, tom.jenkinson, tuxmealux+redhatbz, venkynathan0307, yborgess
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	httpd 2.4.47	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found In Apache httpd. The mod_proxy has a NULL pointer dereference. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-10 17:28:26 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1969234, 1972494, 2090848, 2097247
Bug Blocks:	1966744

Description Pedro Sampaio 2021-06-01 18:46:42 UTC

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.

Reference:
https://svn.apache.org/r1678771

Comment 2 Ted Jongseok Won 2021-06-02 05:47:59 UTC

This vulnerability is out of security support scope for the following products:
 * Red Hat JBoss Enterprise Application Platform 6
 * Red Hat JBoss Enterprise Web Server 2

Please refer to https://access.redhat.com/support/policy/updates/jboss_notes for more details.

Comment 3 Huzaifa S. Sidhpurwala 2021-06-08 03:13:07 UTC

Created httpd tracking bugs for this issue:

Affects: fedora-all [bug 1969234]

Comment 4 Gianluca Gabrielli 2021-06-08 12:07:37 UTC

(In reply to Pedro Sampaio from comment #0)
> In Apache httpd before 2.4.48 mod_proxy has a NULL pointer dereference.

Please correct me if I'm wrong, I think version 2.4.48 might be susceptible to the same bug at this line [0].

[0] https://github.com/apache/httpd/blob/c37a3162d1c0aeb6f3b80e831243daf61596ac87/modules/proxy/mod_proxy_http.c#L456

Comment 8 errata-xmlrpc 2021-11-10 17:15:33 UTC

This issue has been addressed in the following products:

  Red Hat JBoss Core Services

Via RHSA-2021:4613 https://access.redhat.com/errata/RHSA-2021:4613

Comment 9 errata-xmlrpc 2021-11-10 17:18:58 UTC

This issue has been addressed in the following products:

  JBoss Core Services on RHEL 7
  JBoss Core Services for RHEL 8

Via RHSA-2021:4614 https://access.redhat.com/errata/RHSA-2021:4614

Comment 10 Product Security DevOps Team 2021-11-10 17:28:22 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-13950

Comment 13 errata-xmlrpc 2022-06-22 10:24:58 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:5163 https://access.redhat.com/errata/RHSA-2022:5163