Bug 1202406 (CVE-2015-1787) - CVE-2015-1787 openssl: segmentation fault in client authentication with empty CKE and DHE
Summary: CVE-2015-1787 openssl: segmentation fault in client authentication with empty...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2015-1787
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:
Blocks: 1202442
TreeView+ depends on / blocked
 
Reported: 2015-03-16 14:43 UTC by Martin Prpič
Modified: 2023-05-12 08:02 UTC (History)
4 users (show)

Fixed In Version: openssl 1.0.2a
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-03-18 03:38:36 UTC
Embargoed:

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Description Martin Prpič 2015-03-16 14:43:41 UTC 
If client authentication is used, then a server can crash with a segmentation fault in the event of a DHE ciphersuite being selected and a zero length ClientKeyExchange (CKE) message being sent by the client. This could be exploited in a denial of service attack.

This issue affects OpenSSL version 1.0.2, and is fixed in version 1.0.2a.

Acknowledgements:

Red Hat would like to thank the OpenSSL project for reporting this issue. Upstream acknowledges Matt Caswell of the OpenSSL development team as the original reporter.
Comment 1 Huzaifa S. Sidhpurwala 2015-03-18 03:37:22 UTC 
Statement:

This issue did not affect the versions of openssl as shipped with Red Hat Enterprise Linux 5, 6, and 7.
Comment 2 Martin Prpič 2015-03-19 14:34:24 UTC 
External References:

https://openssl.org/news/secadv_20150319.txt
https://access.redhat.com/articles/1384453
Comment 3 Tomas Hoger 2015-03-19 15:44:37 UTC 
Upstream commit:

https://git.openssl.org/?p=openssl.git;a=commitdiff;h=b19d8143212ae5fbc9cebfd51c01f802fabccd33
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