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Red Hat Security Advisory
Synopsis: Important: libyang security update
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
CVE Names: CVE-2019-19333 CVE-2019-19334
=====================================================================
1. Summary:
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 impact
of Important. 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 AppStream (v. 8) – aarch64, ppc64le, s390x, x86_64
3. Description:
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.
4. 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
5. Bugs fixed (https://bugzilla.redhat.com/):
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
6. 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
python3-libyang-debuginfo-0.16.105-3.el8_1.2.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-2019-19333
https://access.redhat.com/security/cve/CVE-2019-19334
https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2019 Red Hat, Inc.
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