Bug 1015946 (CVE-2013-5915) - CVE-2013-5915 polarssl: Information disclosure of RSA private keys
Summary: CVE-2013-5915 polarssl: Information disclosure of RSA private keys
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2013-5915
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: 1015947
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-10-07 05:41 UTC by Ratul Gupta
Modified: 2019-09-29 13:08 UTC (History)
1 user (show)

Fixed In Version: polarssl 1.2.9, polarssl 1.3.0
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-06-08 02:30:36 UTC


Attachments (Terms of Use)

Description Ratul Gupta 2013-10-07 05:41:54 UTC
PolarSSL's RSA implementation was found to have a bias in the implementation of Montgomery multiplication. It can be used to mount an attack on RSA key.

Here, a third party can send arbitrary handshake messages to the server. If correctly executed, this attack could reveal the entire private RSA key after a large number of attack messages are sent to show the timing differences.

There is a known workaround to Disable CRT (#define POLARSSL_RSA_NO_CRT) in config.h. The code will be much slower, but unaffected by this attack, but best is to upgrade to either 1.2.9 or 1.3.0.

References:
https://bugs.gentoo.org/show_bug.cgi?id=487170
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-5915
https://polarssl.org/tech-updates/security-advisories/polarssl-security-advisory-2013-05

Comment 1 Ratul Gupta 2013-10-07 05:42:38 UTC
Created polarssl tracking bugs for this issue:

Affects: fedora-all [bug 1015947]

Comment 3 Mads Kiilerich 2013-10-09 00:36:03 UTC
All fedora versions already had 1.2.9 in testing when this was filed. It would be nice if your automatic tools were a bit smarter.

Comment 5 Fedora Update System 2014-06-19 22:55:02 UTC
polarssl-1.2.10-2.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2014-06-19 22:57:40 UTC
polarssl-1.2.10-2.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Product Security DevOps Team 2019-06-08 02:30:36 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.


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