Bug 1202338 (CVE-2015-0291) - CVE-2015-0291 openssl: ClientHello sigalgs NULL pointer dereference DoS
Summary: CVE-2015-0291 openssl: ClientHello sigalgs NULL pointer dereference DoS
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2015-0291
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1202442
TreeView+ depends on / blocked
 
Reported: 2015-03-16 12:44 UTC by Martin Prpič
Modified: 2019-09-29 13:29 UTC (History)
47 users (show)

Fixed In Version: openssl 1.0.2a
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-03-17 08:09:42 UTC


Attachments (Terms of Use)

Description Martin Prpič 2015-03-16 12:44:52 UTC
A NULL pointer dereference flaw was found in the way OpenSSL handled renegotiation requests with an invalid Signature Algorithms extension. A remote attacker could use this flaw to cause an OpenSSL server to crash.

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

Acknowledgements:

Red Hat would like to thank the OpenSSL project for reporting this issue. Upstream acknowledges David Ramos of Stanford University as the original reporter.

Comment 1 Tomas Hoger 2015-03-17 08:06:36 UTC
Affected code was introduced upstream in version 1.0.2 via this commit:

https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=c70a1fee

It does not existing in openssl packages in Red Hat Enterprise Linux 7 and earlier.

Statement:

This issue did not affect the versions of openssl as shipped with Red Hat Enterprise Linux 5, 6, and 7.


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