Bug 1102329 - (CVE-2014-3469) CVE-2014-3469 libtasn1: asn1_read_value_type() NULL pointer dereference
CVE-2014-3469 libtasn1: asn1_read_value_type() NULL pointer dereference
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20140525,repor...
: Security
Depends On: 1102336 1102337 1102338 1102339 1102355 1102356 1103087 1103088 1103089
Blocks: 1101736
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Reported: 2014-05-28 14:57 EDT by Tomas Hoger
Modified: 2015-11-25 05:06 EST (History)
8 users (show)

See Also:
Fixed In Version: libtasn1 3.6
Doc Type: Bug Fix
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Last Closed: 2014-06-10 08:45:26 EDT
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Description Tomas Hoger 2014-05-28 14:57:56 EDT
A NULL pointer dereference flaw was found in libtasn1's asn1_read_value_type() / asn1_read_value() function. If an application called the function with a NULL value for an ivalue argument to determine the amount of memory needed to store data to be read from the ASN.1 input, libtasn1 could incorrectly attempt to dereference the NULL pointer, causing an application using the library to crash.

The libtasn1 library is used by the GnuTLS library to parse X.509 certificates.  The gnutls packages in Red Hat Enterprise Linux 5 and earlier use bundled libtasn1, packages in Red Hat Enterprise Linux 6 and later depend on the library provided by a separate libtasn1 package.

Upstream commits:
http://git.savannah.gnu.org/cgit/libtasn1.git/commit/lib/element.c?id=a8b3e14f84174e01755bfd1be5448fffce7c9ffa
http://git.savannah.gnu.org/cgit/libtasn1.git/commit/lib/element.c?id=3d6a02f19ff15a38dae9686033e37499b3968256
http://git.savannah.gnu.org/cgit/libtasn1.git/commit/lib/element.c?id=53958290ab731c8486531a3bdef54a933533579d
Comment 3 Tomas Hoger 2014-05-29 07:41:41 EDT
Acknowledgment:

Red Hat would like to thank GnuTLS upstream for reporting this issue.
Comment 4 Tomas Hoger 2014-05-30 04:18:06 EDT
Fixed upstream in libtasn1 3.6:
http://lists.gnu.org/archive/html/help-libtasn1/2014-05/msg00006.html
Comment 5 Tomas Hoger 2014-05-30 04:27:42 EDT
Created libtasn1 tracking bugs for this issue:

Affects: fedora-all [bug 1103087]
Comment 6 Tomas Hoger 2014-05-30 04:27:44 EDT
Created mingw-libtasn1 tracking bugs for this issue:

Affects: fedora-all [bug 1103088]
Comment 7 Tomas Hoger 2014-05-30 04:27:47 EDT
Created mingw32-gnutls tracking bugs for this issue:

Affects: epel-5 [bug 1103089]
Comment 8 errata-xmlrpc 2014-06-03 12:09:45 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:0596 https://rhn.redhat.com/errata/RHSA-2014-0596.html
Comment 9 errata-xmlrpc 2014-06-03 12:10:46 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2014:0594 https://rhn.redhat.com/errata/RHSA-2014-0594.html
Comment 10 Fedora Update System 2014-06-04 03:52:10 EDT
libtasn1-3.6-1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 11 Fedora Update System 2014-06-09 23:06:16 EDT
libtasn1-3.6-1.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 12 errata-xmlrpc 2014-06-10 08:35:44 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:0687 https://rhn.redhat.com/errata/RHSA-2014-0687.html
Comment 13 errata-xmlrpc 2014-06-30 13:29:00 EDT
This issue has been addressed in following products:

  RHEV-H and Agents for RHEL-6

Via RHSA-2014:0815 https://rhn.redhat.com/errata/RHSA-2014-0815.html

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