Bug 1202366 (CVE-2015-0286) - CVE-2015-0286 openssl: invalid pointer use in ASN1_TYPE_cmp()
Summary: CVE-2015-0286 openssl: invalid pointer use in ASN1_TYPE_cmp()
Status: CLOSED ERRATA
Alias: CVE-2015-0286
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: impact=moderate,public=20150319,repor...
Keywords: Security
Depends On: 1242355 1196738 1203070 1203071 1203082 1203083 1203855 1203856 1205026 1205494 1205495 1207507 1242354 1242909 1242910
Blocks: 1202442 1205499 1395463
TreeView+ depends on / blocked
 
Reported: 2015-03-16 13:34 UTC by Martin Prpič
Modified: 2019-06-08 20:29 UTC (History)
51 users (show)

(edit)
An invalid pointer use flaw was found in OpenSSL's ASN1_TYPE_cmp() function. A remote attacker could crash a TLS/SSL client or server using OpenSSL via a specially crafted X.509 certificate when the attacker-supplied certificate was verified by the application.
Clone Of:
(edit)
Last Closed: 2015-04-13 12:30:19 UTC


Attachments (Terms of Use)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:0715 normal SHIPPED_LIVE Moderate: openssl security update 2015-03-24 00:50:48 UTC
Red Hat Product Errata RHSA-2015:0716 normal SHIPPED_LIVE Moderate: openssl security and bug fix update 2015-03-24 03:04:24 UTC
Red Hat Product Errata RHSA-2015:0752 normal SHIPPED_LIVE Moderate: openssl security update 2015-03-30 11:58:28 UTC
Red Hat Product Errata RHSA-2016:2957 normal SHIPPED_LIVE Important: Red Hat JBoss Core Services Apache HTTP 2.4.23 Release 2016-12-16 03:11:19 UTC

Description Martin Prpič 2015-03-16 13:34:59 UTC
The function ASN1_TYPE_cmp will crash with an invalid read if an attempt is made to compare ASN.1 boolean types. Since ASN1_TYPE_cmp is used to check certificate signature algorithm consistency this can be used to crash any certificate verification operation and exploited in a denial of service attack. Any application which performs certificate verification is vulnerable, including OpenSSL clients and servers which enable client authentication.

This issue affects OpenSSL versions: 1.0.2, 1.0.1, 1.0.0, and 0.9.8. This issue is fixed in versions: 1.0.2a, 1.0.1m, 1.0.0r, and 0.9.8zf.

Acknowledgements:

Red Hat would like to thank the OpenSSL project for reporting this issue. Upstream acknowledges Stephen Henson of the OpenSSL development team as the original reporter.

Comment 1 Tomas Hoger 2015-03-17 21:07:31 UTC
The affected ASN1_TYPE_cmp() function was introduced upstream in version 1.0.0 / 0.9.9 via the following commit:

https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=c7235be6

It was only backported to 0.9.8 branch upstream via the following commit:

https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=c22e2dd6

and first included in upstream version 0.9.8zd.  Backport to 0.9.8 was done as a dependency of the CVE-2014-8275 (bug 1180187) fix.  That issue was not fixed in Red Hat Enterprise Linux 5 or earlier, and hence the affected function does not exist in openssl packages in Red Hat Enterprise Linux 5 and earlier.

It is possible that 1.0.0 and 1.0.1 versions prior to the CVE-2014-8275 fix were affected to a lesser extent, as that fix introduced call to the function in X509_verify().

Comment 5 Tomas Hoger 2015-03-18 09:57:54 UTC
The issue here is that ASN1_TYPE structure contains value that is union of various types.  In case of BOOLEAN ASN1 type, value is integer (0 or 0xff).  However, ASN1_TYPE_cmp() failed to handle this special case and used string comparison instead, which lead to value being interpreted as pointer, resulting in out of bounds read (often at NULL or near-NULL).

Comment 8 Tomas Hoger 2015-03-19 19:02:39 UTC
Created openssl tracking bugs for this issue:

Affects: fedora-all [bug 1196738]

Comment 9 Tomas Hoger 2015-03-19 19:02:42 UTC
Created mingw-openssl tracking bugs for this issue:

Affects: fedora-all [bug 1203855]
Affects: epel-7 [bug 1203856]

Comment 10 Fedora Update System 2015-03-22 04:39:54 UTC
openssl-1.0.1k-6.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 11 Fedora Update System 2015-03-22 04:40:35 UTC
openssl-1.0.1k-6.fc22 has been pushed to the Fedora 22 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 12 Fedora Update System 2015-03-23 07:17:51 UTC
openssl-1.0.1e-42.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 13 errata-xmlrpc 2015-03-23 20:51:33 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2015:0715 https://rhn.redhat.com/errata/RHSA-2015-0715.html

Comment 14 errata-xmlrpc 2015-03-23 23:04:41 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:0716 https://rhn.redhat.com/errata/RHSA-2015-0716.html

Comment 17 errata-xmlrpc 2015-03-30 07:58:38 UTC
This issue has been addressed in the following products:

  Red Hat Storage 2.1

Via RHSA-2015:0752 https://rhn.redhat.com/errata/RHSA-2015-0752.html

Comment 22 errata-xmlrpc 2016-12-15 22:14:01 UTC
This issue has been addressed in the following products:



Via RHSA-2016:2957 https://rhn.redhat.com/errata/RHSA-2016-2957.html


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