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
Alias: CVE-2015-0291
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On:
Blocks: 1202442
TreeView+ depends on / blocked
Reported: 2015-03-16 12:44 UTC by Martin Prpič
Modified: 2021-09-13 19:47 UTC (History)
48 users (show)

Fixed In Version: openssl 1.0.2a
Doc Type: Bug Fix
Doc Text:
Clone Of:
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.


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:


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


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

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