Bug 1202369 (CVE-2015-0208)

Summary: CVE-2015-0208 openssl: segmentation fault for invalid PSS parameters
Product: [Other] Security Response Reporter: Martin Prpič <mprpic>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
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:
Fixed In Version: openssl 1.0.2a Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-03-18 03:42:07 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1202442    

Description Martin Prpič 2015-03-16 13:39:19 UTC 
The signature verification routines will crash with a NULL pointer dereference if presented with an ASN.1 signature using the RSA PSS algorithm and invalid parameters. Since these routines are used to verify certificate signature algorithms, this flaw can be used to crash any certificate verification operation and exploited in a DoS attack. Any application which performs certificate verification is vulnerable including OpenSSL clients and servers which enable client authentication.

This issue affects OpenSSL versions 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 Stephen Henson of the OpenSSL development team as the original reporter.
Comment 1 Huzaifa S. Sidhpurwala 2015-03-18 03:42:07 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 14:34:54 UTC 
External References:

https://openssl.org/news/secadv_20150319.txt
https://access.redhat.com/articles/1384453
Comment 3 Tomas Hoger 2015-03-19 15:44:09 UTC 
Upstream commit:

https://git.openssl.org/?p=openssl.git;a=commitdiff;h=4b22cce3812052fe64fc3f6d58d8cc884e3cb834