Bug 1202338 (CVE-2015-0291)

Summary: CVE-2015-0291 openssl: ClientHello sigalgs NULL pointer dereference DoS
Product: [Other] Security Response Reporter: Martin Prpič <mprpic>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: aavati, acathrow, alonbl, bazulay, bmcclain, cdewolf, cfergeau, dandread, darran.lofthouse, dblechte, dknox, ecohen, erik-fedora, gklein, idith, iheim, jason.greene, jawilson, jboss-set, jclere, jdoyle, ktietz, lfarkas, lgao, lsurette, marcandre.lureau, michal.skrivanek, myarboro, nlevinki, pgier, pslavice, rbalakri, rfortier, rhs-bugs, rh-spice-bugs, rjones, rsvoboda, security-response-team, sgirijan, smohan, ssaha, tmraz, twalsh, vbellur, vtunka, weli, yeylon
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=important,public=20150319,reported=20150316,source=upstream,cvss2=5/AV:N/AC:L/Au:N/C:N/I:N/A:P,cwe=CWE-476,rhel-4/openssl=notaffected,rhel-5/openssl=notaffected,rhel-5/openssl097a=notaffected,rhel-6/openssl=notaffected,rhel-6/openssl098e=notaffected,rhel-7/openssl=notaffected,rhel-7/openssl098e=notaffected,fedora-all/openssl=notaffected,fedora-all/mingw-openssl=notaffected,epel-7/mingw-openssl=notaffected,eap-6/openssl=notaffected,jbews-1/openssl=notaffected,jbews-2/openssl=notaffected,jbews-3/openssl=notaffected,rhes-2.1/openssl=notaffected,rhev-m-3/mingw-virt-viewer=notaffected
Fixed In Version: openssl 1.0.2a Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-03-17 08:09:42 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Bug Depends On:    
Bug Blocks: 1202442    

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.