Bug 1471816 (CVE-2017-11343)

Summary:	CVE-2017-11343 chicken: Predictable symbol table due to using default libc seed in PRNG
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	relrod
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2019-06-08 03:16:44 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1471817, 1471818
Bug Blocks:

Description Pedro Sampaio 2017-07-17 13:41:08 UTC

A flaw was found in CHICKEN Scheme symbol table randomization algorithm. The code that sets up the initial symbol table is run _before_ initializing the PRNG, which means the randomization factor uses the initial libc seed state.  On most libc implementations this means the symbol table randomization factor is a constant value which does not differ between runs.

Upstream patch:

http://lists.gnu.org/archive/html/chicken-hackers/2017-06/txtod8Pa1wGU0.txt

References:

http://seclists.org/oss-sec/2017/q3/174
http://lists.nongnu.org/archive/html/chicken-announce/2017-07/msg00000.html

Comment 1 Pedro Sampaio 2017-07-17 13:41:30 UTC

Created chicken tracking bugs for this issue:

Affects: epel-all [bug 1471818]
Affects: fedora-all [bug 1471817]

Comment 2 Product Security DevOps Team 2019-06-08 03:16:44 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.