Bug 1325965 (CVE-2016-4008) - CVE-2016-4008 libtasn1: infinite loop while parsing DER certificates
Summary: CVE-2016-4008 libtasn1: infinite loop while parsing DER certificates
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2016-4008
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1325968 1325969 1325970
Blocks: 1325972
TreeView+ depends on / blocked
 
Reported: 2016-04-11 13:49 UTC by Andrej Nemec
Modified: 2019-09-29 13:46 UTC (History)
22 users (show)

Fixed In Version: libtasn1 4.8
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-05-09 08:35:33 UTC
Embargoed:

Attachments (Terms of Use)

Description Andrej Nemec 2016-04-11 13:49:46 UTC 
The libtasn1 library, in its 4.7 version, can loop for a long time or indefinitely when it is used to parse DER representations of X509 certificates, leading to a denial of service. Some of these loops may in addition increase heap or stack usage, leading to more issues.

References (with reproducer):

http://seclists.org/oss-sec/2016/q2/51
Comment 1 Andrej Nemec 2016-04-11 13:51:19 UTC 
Created libtasn1 tracking bugs for this issue:

Affects: fedora-all [bug 1325968]
Comment 2 Andrej Nemec 2016-04-11 13:51:32 UTC 
Created mingw-libtasn1 tracking bugs for this issue:

Affects: fedora-all [bug 1325969]
Affects: epel-7 [bug 1325970]
Comment 3 Andrej Nemec 2016-04-13 14:26:17 UTC 
CVE assignment:

http://seclists.org/oss-sec/2016/q2/66
Comment 4 Fedora Update System 2016-04-15 03:18:02 UTC 
libtasn1-4.8-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
Comment 5 Fedora Update System 2016-04-22 01:24:53 UTC 
libtasn1-4.8-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 6 Fedora Update System 2016-04-27 22:20:51 UTC 
libtasn1-4.8-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
Comment 7 Huzaifa S. Sidhpurwala 2016-05-09 06:57:31 UTC 
Upstream commit:

http://git.savannah.gnu.org/gitweb/?p=libtasn1.git;a=commit;h=f435825c0f527a8e52e6ffbc3ad0bc60531d537e
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