Bug 1966738 (CVE-2020-13950) - CVE-2020-13950 httpd: mod_proxy NULL pointer dereference
Summary: CVE-2020-13950 httpd: mod_proxy NULL pointer dereference
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-13950
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1969234 1972494 2090848 2097247
Blocks: 1966744
TreeView+ depends on / blocked
 
Reported: 2021-06-01 18:46 UTC by Pedro Sampaio
Modified: 2022-07-20 12:08 UTC (History)
49 users (show)

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.
Clone Of:
Environment:
Last Closed: 2021-11-10 17:28:26 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:4613 0 None None None 2021-11-10 17:15:36 UTC
Red Hat Product Errata RHSA-2021:4614 0 None None None 2021-11-10 17:19:01 UTC
Red Hat Product Errata RHSA-2022:5163 0 None None None 2022-06-22 10:25:03 UTC

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
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