Bug 1218141 – CVE-2015-3622 libtasn1: heap overflow flaw in _asn1_extract_der_octet()

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Bug 1218141 - (CVE-2015-3622) CVE-2015-3622 libtasn1: heap overflow flaw in _asn1_extract_der_octet()

Summary:	CVE-2015-3622 libtasn1: heap overflow flaw in _asn1_extract_der_octet()

Status:	NEW

Aliases:	CVE-2015-3622

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20150430,repor...
Keywords:	Security

Depends On:	1218142 1218143 1218144 1421361
Blocks:	1218146
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Reported:	2015-05-04 05:32 EDT by Martin Prpič
Modified:	2018-07-18 10:39 EDT (History)
CC List:	19 users (show)

See Also:
Fixed In Version:	libtasn1 4.5
Doc Type:	Bug Fix
Doc Text:	A heap-based buffer overflow flaw was found in the way the libtasn1 library decoded certain DER-encoded inputs. A specially crafted DER-encoded input could cause an application using libtasn1 to perform an invalid read, causing the application to crash.
Story Points:	---
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Environment:
Last Closed:
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Regression:	---
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Verified Versions:
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2017:1860	normal	SHIPPED_LIVE	Moderate: libtasn1 security, bug fix, and enhancement update	2017-08-01 13:50:00 EDT

Groups: None (edit)

Description Martin Prpič 2015-05-04 05:32:28 EDT

A heap-based buffer overflow flaw was found in the way the libtasn1 library decoded certain DER-encoded input. A specially crafted, DER-encoded input could cause an application using libtasn1 to perform an invalid read, causing the application to crash.

Upstream patch:

http://git.savannah.gnu.org/gitweb/?p=libtasn1.git;a=commitdiff;h=f979435823a02f842c41d49cd41cc81f25b5d677

Comment 1 Martin Prpič 2015-05-04 05:33:58 EDT

Reproducer:

https://crashes.fuzzing-project.org/TFPA-2015-005-libtasn1-4.4-heap-overflow.crt

Sample malformed certificate exposing heap overflow (test with certtool -i --inder --infile=[sample] and address sanitizer or valgrind)

Comment 2 Martin Prpič 2015-05-04 05:34:45 EDT

Created libtasn1 tracking bugs for this issue:

Affects: fedora-all [bug 1218142]

Comment 3 Martin Prpič 2015-05-04 05:34:49 EDT

Created mingw-libtasn1 tracking bugs for this issue:

Affects: fedora-all [bug 1218143]
Affects: epel-7 [bug 1218144]

Comment 5 Fedora Update System 2015-05-19 12:20:45 EDT

libtasn1-4.5-1.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 9 Huzaifa S. Sidhpurwala 2015-06-02 00:58:43 EDT

Statement:

Red Hat Product Security has rated this issue as having moderate security impact, a future update may address this flaw in the libtasn1 packages.

Comment 12 errata-xmlrpc 2017-08-01 11:09:53 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1860 https://access.redhat.com/errata/RHSA-2017:1860

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