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AUSCERT External Security Bulletin Redistribution
ESB-2017.1877
Moderate: libtasn1 security, bug fix, and enhancement update
2 August 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: libtasn1
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Red Hat Enterprise Linux WS/Desktop 7
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-3622 CVE-2015-2806
Reference: ESB-2015.1259
ESB-2015.0934
Original Bulletin:
https://access.redhat.com/errata/RHSA-2017:1860
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Red Hat Security Advisory
Synopsis: Moderate: libtasn1 security, bug fix, and enhancement update
Advisory ID: RHSA-2017:1860-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1860
Issue date: 2017-08-01
CVE Names: CVE-2015-2806 CVE-2015-3622
=====================================================================
1. Summary:
An update for libtasn1 is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64
3. Description:
Libtasn1 is a library that provides Abstract Syntax Notation One (ASN.1, as
specified by the X.680 ITU-T recommendation) parsing and structures
management, and Distinguished Encoding Rules (DER, as per X.690) encoding
and decoding functions.
The following packages have been upgraded to a later upstream version:
libtasn1 (4.10). (BZ#1360639)
Security Fix(es):
* 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. (CVE-2015-3622)
* A stack-based buffer overflow was found in the way libtasn1 decoded
certain DER encoded data. An attacker could use this flaw to crash an
application using the libtasn1 library. (CVE-2015-2806)
Additional Changes:
For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.4 Release Notes linked from the References section.
4. Solution:
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
5. Bugs fixed (https://bugzilla.redhat.com/):
1207192 - CVE-2015-2806 libtasn1: stack overflow in asn1_der_decoding
1218141 - CVE-2015-3622 libtasn1: heap overflow flaw in _asn1_extract_der_octet()
1360639 - update to libtasn1 4.x branch
6. Package List:
Red Hat Enterprise Linux Client (v. 7):
Source:
libtasn1-4.10-1.el7.src.rpm
x86_64:
libtasn1-4.10-1.el7.i686.rpm
libtasn1-4.10-1.el7.x86_64.rpm
libtasn1-debuginfo-4.10-1.el7.i686.rpm
libtasn1-debuginfo-4.10-1.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64:
libtasn1-debuginfo-4.10-1.el7.i686.rpm
libtasn1-debuginfo-4.10-1.el7.x86_64.rpm
libtasn1-devel-4.10-1.el7.i686.rpm
libtasn1-devel-4.10-1.el7.x86_64.rpm
libtasn1-tools-4.10-1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
libtasn1-4.10-1.el7.src.rpm
x86_64:
libtasn1-4.10-1.el7.i686.rpm
libtasn1-4.10-1.el7.x86_64.rpm
libtasn1-debuginfo-4.10-1.el7.i686.rpm
libtasn1-debuginfo-4.10-1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64:
libtasn1-debuginfo-4.10-1.el7.i686.rpm
libtasn1-debuginfo-4.10-1.el7.x86_64.rpm
libtasn1-devel-4.10-1.el7.i686.rpm
libtasn1-devel-4.10-1.el7.x86_64.rpm
libtasn1-tools-4.10-1.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
libtasn1-4.10-1.el7.src.rpm
aarch64:
libtasn1-4.10-1.el7.aarch64.rpm
libtasn1-debuginfo-4.10-1.el7.aarch64.rpm
libtasn1-devel-4.10-1.el7.aarch64.rpm
ppc64:
libtasn1-4.10-1.el7.ppc.rpm
libtasn1-4.10-1.el7.ppc64.rpm
libtasn1-debuginfo-4.10-1.el7.ppc.rpm
libtasn1-debuginfo-4.10-1.el7.ppc64.rpm
libtasn1-devel-4.10-1.el7.ppc.rpm
libtasn1-devel-4.10-1.el7.ppc64.rpm
ppc64le:
libtasn1-4.10-1.el7.ppc64le.rpm
libtasn1-debuginfo-4.10-1.el7.ppc64le.rpm
libtasn1-devel-4.10-1.el7.ppc64le.rpm
s390x:
libtasn1-4.10-1.el7.s390.rpm
libtasn1-4.10-1.el7.s390x.rpm
libtasn1-debuginfo-4.10-1.el7.s390.rpm
libtasn1-debuginfo-4.10-1.el7.s390x.rpm
libtasn1-devel-4.10-1.el7.s390.rpm
libtasn1-devel-4.10-1.el7.s390x.rpm
x86_64:
libtasn1-4.10-1.el7.i686.rpm
libtasn1-4.10-1.el7.x86_64.rpm
libtasn1-debuginfo-4.10-1.el7.i686.rpm
libtasn1-debuginfo-4.10-1.el7.x86_64.rpm
libtasn1-devel-4.10-1.el7.i686.rpm
libtasn1-devel-4.10-1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
aarch64:
libtasn1-debuginfo-4.10-1.el7.aarch64.rpm
libtasn1-tools-4.10-1.el7.aarch64.rpm
ppc64:
libtasn1-debuginfo-4.10-1.el7.ppc64.rpm
libtasn1-tools-4.10-1.el7.ppc64.rpm
ppc64le:
libtasn1-debuginfo-4.10-1.el7.ppc64le.rpm
libtasn1-tools-4.10-1.el7.ppc64le.rpm
s390x:
libtasn1-debuginfo-4.10-1.el7.s390x.rpm
libtasn1-tools-4.10-1.el7.s390x.rpm
x86_64:
libtasn1-debuginfo-4.10-1.el7.x86_64.rpm
libtasn1-tools-4.10-1.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
libtasn1-4.10-1.el7.src.rpm
x86_64:
libtasn1-4.10-1.el7.i686.rpm
libtasn1-4.10-1.el7.x86_64.rpm
libtasn1-debuginfo-4.10-1.el7.i686.rpm
libtasn1-debuginfo-4.10-1.el7.x86_64.rpm
libtasn1-devel-4.10-1.el7.i686.rpm
libtasn1-devel-4.10-1.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 7):
x86_64:
libtasn1-debuginfo-4.10-1.el7.x86_64.rpm
libtasn1-tools-4.10-1.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2015-2806
https://access.redhat.com/security/cve/CVE-2015-3622
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/7.4_Release_Notes/index.html
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2017 Red Hat, Inc.
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