Bug 2034672 (CVE-2021-44224) - CVE-2021-44224 httpd: possible NULL dereference or SSRF in forward proxy configurations [NEEDINFO]
Summary: CVE-2021-44224 httpd: possible NULL dereference or SSRF in forward proxy conf...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-44224
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2035029 2066311 2034673 2035030 2035031 2035125
Blocks: 2034676
TreeView+ depends on / blocked
 
Reported: 2021-12-21 16:49 UTC by Guilherme de Almeida Suckevicz
Modified: 2022-05-17 09:41 UTC (History)
63 users (show)

Fixed In Version: httpd 2.4.52
Doc Type: If docs needed, set a value
Doc Text:
There's a null pointer dereference and server-side request forgery flaw in httpd's mod_proxy module, when it is configured to be used as a forward proxy. A crafted packet could be sent on the adjacent network to the forward proxy that could cause a crash, or potentially SSRF via misdirected Unix Domain Socket requests. In the worst case, this could cause a denial of service or compromise to confidentiality of data.
Clone Of:
Environment:
Last Closed: 2022-05-12 00:16:12 UTC
bnater: needinfo? (luhliari)

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2022:1915 0 None None None 2022-05-10 14:17:42 UTC

Internal Links: 2042795

Description Guilherme de Almeida Suckevicz 2021-12-21 16:49:54 UTC 
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).

References:
http://httpd.apache.org/security/vulnerabilities_24.html
http://www.openwall.com/lists/oss-security/2021/12/20/3
Comment 1 Guilherme de Almeida Suckevicz 2021-12-21 16:50:17 UTC 
Created httpd tracking bugs for this issue:

Affects: fedora-all [bug 2034673]
Comment 2 Todd Cullum 2021-12-22 02:29:10 UTC 
Potentially relevant upstream commits:
https://svn.apache.org/viewvc?view=revision&revision=1895921
https://svn.apache.org/viewvc?view=revision&revision=1895981
https://svn.apache.org/viewvc?view=revision&revision=r1895955
Comment 3 Ted Jongseok Won 2021-12-22 07:40:22 UTC 
This vulnerability is out of security support scope for the following product:
 * Red Hat JBoss Enterprise Application Platform 6

Please refer to https://access.redhat.com/support/policy/updates/jboss_notes for more details.
Comment 14 errata-xmlrpc 2022-05-10 14:17:38 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1915 https://access.redhat.com/errata/RHSA-2022:1915
Comment 15 Product Security DevOps Team 2022-05-12 00:16:07 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-2021-44224
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