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Red Hat Enterprise Linux 8 RHSA-2019-4360-01 Important Buffer Overflow Fix

red hat
Calendar Grey December 22, 2019
Dist Redhat Esm H88
Critical libyang security patch now released for Red Hat Enterprise Linux 8. Refer to the advisory for more information.
An update for libyang is now available for Red Hat Enterprise Linux 8

Solution

If you have previously installed libyang-devel, remove it prior to applying this advisory to make the update successful.

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

The libyang package provides a library for YANG data modeling language. libyang is a YANG data modelling language parser and toolkit written (and providing API) in C. The library is used e.g. in libnetconf2, Netopeer2, sysrepo and FRRouting projects.
Security Fix(es):
* libyang: stack-based buffer overflow in make_canonical when bits leaf type is used (CVE-2019-19333)
* libyang: stack-based buffer overflow in make_canonical when identityref leaf type is used (CVE-2019-19334)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
IMPORTANT:
The libyang-devel sub-package has recently been removed from the AppStream repository. If you have previously installed libyang-devel, remove it prior to applying this advisory to make the update successful.

Topics%20covered

Topics Covered

security advisory security update buffer overflow Red Hat Enterprise Linux libyang

References

https://access.redhat.com/security/cve/CVE-2019-19333 https://access.redhat.com/security/cve/CVE-2019-19334 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: libyang-0.16.105-3.el8_1.2.src.rpm
aarch64: libyang-0.16.105-3.el8_1.2.aarch64.rpm libyang-cpp-debuginfo-0.16.105-3.el8_1.2.aarch64.rpm libyang-debuginfo-0.16.105-3.el8_1.2.aarch64.rpm libyang-debugsource-0.16.105-3.el8_1.2.aarch64.rpm python3-libyang-debuginfo-0.16.105-3.el8_1.2.aarch64.rpm
ppc64le: libyang-0.16.105-3.el8_1.2.ppc64le.rpm libyang-cpp-debuginfo-0.16.105-3.el8_1.2.ppc64le.rpm libyang-debuginfo-0.16.105-3.el8_1.2.ppc64le.rpm libyang-debugsource-0.16.105-3.el8_1.2.ppc64le.rpm python3-libyang-debuginfo-0.16.105-3.el8_1.2.ppc64le.rpm
s390x: libyang-0.16.105-3.el8_1.2.s390x.rpm libyang-cpp-debuginfo-0.16.105-3.el8_1.2.s390x.rpm libyang-debuginfo-0.16.105-3.el8_1.2.s390x.rpm libyang-debugsource-0.16.105-3.el8_1.2.s390x.rpm python3-libyang-debuginfo-0.16.105-3.el8_1.2.s390x.rpm
x86_64: libyang-0.16.105-3.el8_1.2.i686.rpm libyang-0.16.105-3.el8_1.2.x86_64.rpm libyang-cpp-debuginfo-0.16.105-3.el8_1.2.i686.rpm libyang-cpp-debuginfo-0.16.105-3.el8_1.2.x86_64.rpm libyang-debuginfo-0.16.105-3.el8_1.2.i686.rpm libyang-debuginfo-0.16.105-3.el8_1.2.x86_64.rpm libyang-debugsource-0.16.105-3.el8_1.2.i686.rpm libyang-debugsource-0.16.105-3.el8_1.2.x86_64.rpm python3-libyang-debuginfo-0.16.105-3.el8_1.2.i686.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:4360-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:4360
Issue date: 2019-12-23

Topic

An update for libyang is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security update buffer overflow Red Hat Enterprise Linux libyang

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1779573 - CVE-2019-19333 libyang: stack-based buffer overflow in make_canonical when bits leaf type is used

1779576 - CVE-2019-19334 libyang: stack-based buffer overflow in make_canonical when identityref leaf type is used

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