Bug 997767 (CVE-2013-4623)

Summary:	CVE-2013-4623 polarssl: denial of service (infinite loop) when parsing certain PEM encoded certificates
Product:	[Other] Security Response	Reporter:	Murray McAllister <mmcallis>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	mads
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 11:00:57 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:	997770
Bug Blocks:

Description Murray McAllister 2013-08-16 07:55:56 UTC

From the PolarSSL Security Advisory 2013-03 advisory:

"A bug in the logic of the parsing of PEM encoded certificates in x509parse_crt() can result in an infinite loop, thus hogging processing power."

A remote attacker could use this flaw to make a TLS/SSL server using PolarSSL consume an excessive amount of CPU.

This issue was corrected in PolarSSL versions 1.1.7 and 1.2.8. (Versions prior to these are affected.)

External References:

https://polarssl.org/tech-updates/security-advisories/polarssl-security-advisory-2013-03

Comment 1 Murray McAllister 2013-08-16 07:59:00 UTC

Created polarssl tracking bugs for this issue:

Affects: fedora-all [bug 997770]

Comment 2 Murray McAllister 2013-08-16 08:03:44 UTC

The patch included in the upstream advisory looks to be this commit:

https://github.com/polarssl/polarssl/commit/1922a4e6aade7b1d685af19d4d9339ddb5c02859

Comment 3 Fedora Update System 2013-09-20 16:26:17 UTC

polarssl-1.2.8-1.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2013-09-20 16:27:29 UTC

polarssl-1.2.8-1.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2013-09-23 00:13:16 UTC

polarssl-1.2.8-1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Product Security DevOps Team 2019-06-10 11:00:57 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.