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Red Hat 7 RHSA-2014:0687-01 Moderate: libtasn1 Buffer Overflow Issues

red hat
Calendar Grey June 10, 2014
Dist Redhat Esm H88
The recent moderate security update for libtasn1 on Red Hat Enterprise Linux 7 fixes critical vulnerabilities, improving the library's security against threats and enhancing error handling
Updated libtasn1 packages that fix three security issues are now available for Red Hat Enterprise Linux 7

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/site/articles/11258

Summary

The libtasn1 library provides Abstract Syntax Notation One (ASN.1) parsing and structures management, and Distinguished Encoding Rules (DER) encoding and decoding functions.
It was discovered that the asn1_get_bit_der() function of the libtasn1 library incorrectly reported the length of ASN.1-encoded data. Specially crafted ASN.1 input could cause an application using libtasn1 to perform an out-of-bounds access operation, causing the application to crash or, possibly, execute arbitrary code. (CVE-2014-3468)
Multiple incorrect buffer boundary check issues were discovered in libtasn1. Specially crafted ASN.1 input could cause an application using libtasn1 to crash. (CVE-2014-3467)
Multiple NULL pointer dereference flaws were found in libtasn1's asn1_read_value() function. Specially crafted ASN.1 input could cause an application using libtasn1 to crash, if the application used the aforementioned function in a certain way. (CVE-2014-3469)
Red Hat would like to thank GnuTLS upstream for reporting these issues.
All libtasn1 users are advised to upgrade to these updated packages, which correct these issues. For the update to take effect, all applications linked to the libtasn1 library must be restarted.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat buffer overflow threat libtasn1

References

https://access.redhat.com/security/cve/CVE-2014-3467 https://access.redhat.com/security/cve/CVE-2014-3468 https://access.redhat.com/security/cve/CVE-2014-3469 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: libtasn1-3.3-5.el7_0.src.rpm
x86_64: libtasn1-3.3-5.el7_0.i686.rpm libtasn1-3.3-5.el7_0.x86_64.rpm libtasn1-debuginfo-3.3-5.el7_0.i686.rpm libtasn1-debuginfo-3.3-5.el7_0.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: libtasn1-debuginfo-3.3-5.el7_0.i686.rpm libtasn1-debuginfo-3.3-5.el7_0.x86_64.rpm libtasn1-devel-3.3-5.el7_0.i686.rpm libtasn1-devel-3.3-5.el7_0.x86_64.rpm libtasn1-tools-3.3-5.el7_0.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: libtasn1-3.3-5.el7_0.src.rpm
x86_64: libtasn1-3.3-5.el7_0.i686.rpm libtasn1-3.3-5.el7_0.x86_64.rpm libtasn1-debuginfo-3.3-5.el7_0.i686.rpm libtasn1-debuginfo-3.3-5.el7_0.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: libtasn1-debuginfo-3.3-5.el7_0.i686.rpm libtasn1-debuginfo-3.3-5.el7_0.x86_64.rpm libtasn1-devel-3.3-5.el7_0.i686.rpm libtasn1-devel-3.3-5.el7_0.x86_64.rpm libtasn1-tools-3.3-5.el7_0.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: libtasn1-3.3-5.el7_0.src.rpm
ppc64: libtasn1-3.3-5.el7_0.ppc.rpm libtasn1-3.3-5.el7_0.ppc64.rpm libtasn1-debuginfo-3.3-5.el7_0.ppc.rpm libtasn1-debuginfo-3.3-5.el7_0.ppc64.rpm libtasn1-devel-3.3-5.el7_0.ppc.rpm libtasn1-devel-3.3-5.el7_0.ppc64.rpm
s390x: libtasn1-3.3-5.el7_0.s390.rpm

Read the Full Advisory


Advisory ID: RHSA-2014:0687-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2014:0687.html
Issue date: 2014-06-10

Topic

Updated libtasn1 packages that fix three security issues are now availablefor Red Hat Enterprise Linux 7.The Red Hat Security Response Team has rated this update as having Moderatesecurity impact. Common Vulnerability Scoring System (CVSS) base scores,which give detailed severity ratings, are available for each vulnerabilityfrom the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat buffer overflow threat libtasn1

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) - ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1102022 - CVE-2014-3467 libtasn1: multiple boundary check issues

1102323 - CVE-2014-3468 libtasn1: asn1_get_bit_der() can return negative bit length

1102329 - CVE-2014-3469 libtasn1: asn1_read_value_type() NULL pointer dereference

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