Bug 1370146 (CVE-2016-6303)

Summary: CVE-2016-6303 openssl: Integer overflow in MDC2_Update()
Product: [Other] Security Response Reporter: Adam Mariš <amaris>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bbaranow, bmaxwell, cdewolf, csutherl, dandread, darran.lofthouse, dosoudil, erik-fedora, gzaronik, jaeshin, jawilson, jclere, ktietz, lersek, lgao, marcandre.lureau, mbabacek, myarboro, pgier, psakar, pslavice, redhat-bugzilla, rjones, rnetuka, rsvoboda, sardella, slawomir, tmraz, twalsh, vtunka, weli
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Clone Of: Environment:
Last Closed: 2016-09-16 20:36:25 UTC Type: ---
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1370147, 1370148, 1370149    
Bug Blocks: 1367347    

Description Adam Mariš 2016-08-25 12:07:00 UTC
Possible integer overflow vulnerability was found in MDC2_Update() function that can lead to out-of-bounds write.

Upstream patch:

https://github.com/openssl/openssl/commit/2b4029e68fd7002d2307e6c3cde0f3784eef9c83

Comment 1 Adam Mariš 2016-08-25 12:07:50 UTC
Created openssl101e tracking bugs for this issue:

Affects: epel-5 [bug 1370149]

Comment 2 Adam Mariš 2016-08-25 12:08:05 UTC
Created openssl tracking bugs for this issue:

Affects: fedora-all [bug 1370147]

Comment 3 Adam Mariš 2016-08-25 12:08:16 UTC
Created mingw-openssl tracking bugs for this issue:

Affects: fedora-all [bug 1370148]

Comment 4 Tomas Hoger 2016-09-16 20:36:25 UTC
MDC-2 support is not enabled in OpenSSL packages in Red Hat products.  Therefore, this issue can not affect those packages.

Comment 5 Tomas Hoger 2016-09-20 20:25:35 UTC
Statement:

Not vulnerable. This issue did not affect the versions of openssl as shipped with Red Hat Enterprise Linux 4, 5, 6, and 7, as they did not include support for MDC-2.