Issued:

2017-08-01

Updated:

2017-08-01

RHSA-2017:1860 - Moderate: libtasn1 security, bug fix, and enhancement update

Synopsis

Moderate: libtasn1 security, bug fix, and enhancement update

Type/Severity

Security Advisory Moderate

Topic

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.

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.

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

Affected Products

Updated Packages

• libtasn1-4.10-1.el7.ppc64.rpm
• libtasn1-4.10-1.el7.ppc64le.rpm
• libtasn1-devel-4.10-1.el7.i686.rpm
• libtasn1-devel-4.10-1.el7.x86_64.rpm
• libtasn1-debuginfo-4.10-1.el7.s390.rpm
• libtasn1-4.10-1.el7.x86_64.rpm
• libtasn1-4.10-1.el7.s390.rpm
• libtasn1-devel-4.10-1.el7.ppc64le.rpm
• libtasn1-devel-4.10-1.el7.s390.rpm
• libtasn1-debuginfo-4.10-1.el7.ppc64.rpm
• libtasn1-devel-4.10-1.el7.ppc.rpm
• libtasn1-devel-4.10-1.el7.aarch64.rpm
• libtasn1-debuginfo-4.10-1.el7.s390x.rpm
• libtasn1-debuginfo-4.10-1.el7.x86_64.rpm
• libtasn1-devel-4.10-1.el7.s390x.rpm
• libtasn1-tools-4.10-1.el7.ppc64.rpm
• libtasn1-tools-4.10-1.el7.ppc64le.rpm
• libtasn1-4.10-1.el7.s390x.rpm
• libtasn1-debuginfo-4.10-1.el7.i686.rpm
• libtasn1-4.10-1.el7.ppc.rpm
• libtasn1-4.10-1.el7.aarch64.rpm
• libtasn1-4.10-1.el7.src.rpm
• libtasn1-debuginfo-4.10-1.el7.aarch64.rpm
• libtasn1-debuginfo-4.10-1.el7.ppc.rpm
• libtasn1-devel-4.10-1.el7.ppc64.rpm
• libtasn1-tools-4.10-1.el7.aarch64.rpm
• libtasn1-4.10-1.el7.i686.rpm
• libtasn1-tools-4.10-1.el7.s390x.rpm
• libtasn1-debuginfo-4.10-1.el7.ppc64le.rpm
• libtasn1-tools-4.10-1.el7.x86_64.rpm

Fixes

• This content is not included.BZ - 1207192
• This content is not included.BZ - 1218141
• This content is not included.BZ - 1360639

CVEs

• CVE-2015-2806
• CVE-2015-3622

References

• 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

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.