Bug 997767 - (CVE-2013-4623) CVE-2013-4623 polarssl: denial of service (infinite loop) when parsing certain PEM encoded certificates
CVE-2013-4623 polarssl: denial of service (infinite loop) when parsing certai...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20130606,repor...
: Security
Depends On: 997770
Blocks:
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Reported: 2013-08-16 03:55 EDT by Murray McAllister
Modified: 2016-03-04 06:31 EST (History)
1 user (show)

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Description Murray McAllister 2013-08-16 03:55:56 EDT
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 03:59:00 EDT
Created polarssl tracking bugs for this issue:

Affects: fedora-all [bug 997770]
Comment 2 Murray McAllister 2013-08-16 04:03:44 EDT
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 12:26:17 EDT
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 12:27:29 EDT
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 2013-09-22 20:13:16 EDT
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.

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