Bug 1839856 (CVE-2019-20800)

Summary:	CVE-2019-20800 cherokee: out-of-bounds write in cherokee_handler_cgi_add_env_pair function in handler_cgi.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	pavel.lisy
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-05-25 21:15:28 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:	1839857, 1839858
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2020-05-25 19:03:00 UTC

In Cherokee through 1.2.104, remote attackers can trigger an out-of-bounds write in cherokee_handler_cgi_add_env_pair in handler_cgi.c by sending many request headers, as demonstrated by a GET request with many "Host: 127.0.0.1" headers.

References:
https://github.com/cherokee/webserver/issues/1224
https://logicaltrust.net/blog/2019/11/cherokee.html

Comment 1 Guilherme de Almeida Suckevicz 2020-05-25 19:03:21 UTC

Created cherokee tracking bugs for this issue:

Affects: epel-6 [bug 1839858]
Affects: fedora-all [bug 1839857]

Comment 2 Product Security DevOps Team 2020-05-25 21:15:28 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.