Topic

An update for libvpx is now available for Red Hat Enterprise Linux 8.

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

The libvpx packages provide the VP8 SDK, which allows the encoding and decoding of the VP8 video codec, commonly used with the WebM multimedia container file format.

Security Fix(es):

• libvpx: Double free in ParseContentEncodingEntry() in mkvparser.cc (CVE-2019-2126)
• libvpx: Out of bounds read in vp8_norm table (CVE-2019-9232)
• libvpx: Resource exhaustion after memory leak in mkvparser.cc (CVE-2019-9371)
• libvpx: Use-after-free in vp8_deblock() in vp8/common/postproc.c (CVE-2019-9433)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.3 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

After installing the update, all applications using libvpx must be restarted for the changes to take effect.

Affected Products

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat CodeReady Linux Builder for x86_64 8 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 8 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 8 s390x

Fixes

• BZ - 1788966 - CVE-2019-9232 libvpx: Out of bounds read in vp8_norm table
• BZ - 1788994 - CVE-2019-9433 libvpx: Use-after-free in vp8_deblock() in vp8/common/postproc.c
• BZ - 1789004 - CVE-2019-9371 libvpx: Resource exhaustion after memory leak in mkvparser.cc
• BZ - 1789008 - CVE-2019-2126 libvpx: Double free in ParseContentEncodingEntry() in mkvparser.cc

CVEs

• CVE-2019-2126
• CVE-2019-9232
• CVE-2019-9371
• CVE-2019-9433

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/