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Bug 1373229 - (CVE-2016-7141) CVE-2016-7141 curl: Incorrect reuse of client certificates
CVE-2016-7141 curl: Incorrect reuse of client certificates
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20160905,reported=2...
: Security
Depends On: 1373232 1364910 1373230 1373231
Blocks: 1362200 1395463
  Show dependency tree / graph
 
Reported: 2016-09-05 10:41 EDT by Adam Mariš
Modified: 2018-07-18 11:00 EDT (History)
26 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
It was found that the libcurl library using the NSS (Network Security Services) library as TLS/SSL backend incorrectly re-used client certificates for subsequent TLS connections in certain cases. An attacker could potentially use this flaw to hijack the authentication of the connection by leveraging a previously created connection with a different client certificate.
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
Add an attachment (proposed patch, testcase, etc.)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:2575 normal SHIPPED_LIVE Moderate: curl security, bug fix, and enhancement update 2016-11-03 08:06:39 EDT
Red Hat Product Errata RHSA-2016:2957 normal SHIPPED_LIVE Important: Red Hat JBoss Core Services Apache HTTP 2.4.23 Release 2016-12-15 22:11:19 EST

  None (edit)
Description Adam Mariš 2016-09-05 10:41:01 EDT 
After testing original CVE-2016-5420 patch, it was discovered that libcurl built on top of NSS (Network Security Services) still incorrectly re-uses client certificates if a certificate from file is used for one TLS connection but no certificate is set for a subsequent TLS connection.

The original patch for CVE-2016-5420 has been amended to also contain the attached patch:

https://curl.haxx.se/CVE-2016-5420.patch
Comment 1 Adam Mariš 2016-09-05 10:42:02 EDT 
Created curl tracking bugs for this issue:

Affects: fedora-all [bug 1373230]
Comment 2 Adam Mariš 2016-09-05 10:42:19 EDT 
Created mingw-curl tracking bugs for this issue:

Affects: fedora-all [bug 1373231]
Affects: epel-7 [bug 1373232]
Comment 4 Adam Mariš 2016-09-06 07:23:09 EDT 
CVE assignment:

http://seclists.org/oss-sec/2016/q3/419
Comment 6 errata-xmlrpc 2016-11-03 13:46:00 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2575 https://rhn.redhat.com/errata/RHSA-2016-2575.html
Comment 8 errata-xmlrpc 2016-12-15 17:12:12 EST 
This issue has been addressed in the following products:



Via RHSA-2016:2957 https://rhn.redhat.com/errata/RHSA-2016-2957.html
Comment 9 Tomas Hoger 2018-01-10 16:31:00 EST 
External References:

https://curl.haxx.se/docs/adv_20160907.html
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