Bug 1319052 (CVE-2016-3099) - CVE-2016-3099 mod_nss: Invalid handling of +CIPHER operator
Summary: CVE-2016-3099 mod_nss: Invalid handling of +CIPHER operator
Status: NEW
Alias: CVE-2016-3099
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=low,public=20160405,reported=2...
Keywords: Security
Depends On: 1323913 1323914
Blocks: 1319056 1323912
TreeView+ depends on / blocked
 
Reported: 2016-03-18 14:30 UTC by Adam Mariš
Modified: 2016-11-04 07:59 UTC (History)
9 users (show)

(edit)
A flaw was found in the way mod_nss parsed certain OpenSSL-style cipher strings. As a result, mod_nss could potentially use ciphers that were not intended to be enabled.
Clone Of:
(edit)
Last Closed:


Attachments (Terms of Use)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:2602 normal SHIPPED_LIVE Low: mod_nss security, bug fix, and enhancement update 2016-11-03 12:12:49 UTC

Description Adam Mariš 2016-03-18 14:30:28 UTC
It was reported that +CIPHER operator in OpenSSL changes the order of a cipher. Since cipher ordering isn't supported in NSS, the mod_nss code was supposed to return an error. Instead it returned the result of processing up to that point. Default OpenSSL cipher string:

!SSLv2:kEECDH:kRSA:kEDH:kPSK:+3DES:!aNULL:!eNULL:!MD5:!EXP:!RC4:!SEED:!IDEA:!DES

Would not properly exclude anything because only the first 5 elements would be examined.

Comment 1 Adam Mariš 2016-03-18 14:30:35 UTC
Acknowledgments:

Name: Rob Crittenden (Red Hat)

Comment 4 Huzaifa S. Sidhpurwala 2016-04-05 04:49:23 UTC
Created mod_nss tracking bugs for this issue:

Affects: fedora-all [bug 1323914]

Comment 5 errata-xmlrpc 2016-11-03 21:20:27 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2602 https://rhn.redhat.com/errata/RHSA-2016-2602.html


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