RHSA-2021:4231 - Security Advisory

Topic

An update for libwebp 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 libwebp packages provide a library and tools for the WebP graphics format. WebP is an image format with a lossy compression of digital photographic images. WebP consists of a codec based on the VP8 format, and a container based on the Resource Interchange File Format (RIFF). Webmasters, web developers and browser developers can use WebP to compress, archive, and distribute digital images more efficiently.

Security Fix(es):

• libwebp: out-of-bounds read in WebPMuxCreateInternal (CVE-2018-25009)
• libwebp: out-of-bounds read in ApplyFilter() (CVE-2018-25010)
• libwebp: out-of-bounds read in WebPMuxCreateInternal() (CVE-2018-25012)
• libwebp: out-of-bounds read in ShiftBytes() (CVE-2018-25013)
• libwebp: use of uninitialized value in ReadSymbol() (CVE-2018-25014)
• libwebp: out-of-bounds read in ChunkVerifyAndAssign() in mux/muxread.c (CVE-2020-36330)
• libwebp: out-of-bounds read in ChunkAssignData() in mux/muxinternal.c (CVE-2020-36331)
• libwebp: excessive memory allocation when reading a file (CVE-2020-36332)

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 8.5 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

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.6 x86_64
• Red Hat Enterprise Linux Server - AUS 8.6 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.6 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.6 ppc64le
• Red Hat Enterprise Linux Server - TUS 8.6 x86_64
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.6 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.6 x86_64

Fixes

• BZ - 1956853 - CVE-2020-36330 libwebp: out-of-bounds read in ChunkVerifyAndAssign() in mux/muxread.c
• BZ - 1956856 - CVE-2020-36331 libwebp: out-of-bounds read in ChunkAssignData() in mux/muxinternal.c
• BZ - 1956868 - CVE-2020-36332 libwebp: excessive memory allocation when reading a file
• BZ - 1956917 - CVE-2018-25009 libwebp: out-of-bounds read in WebPMuxCreateInternal
• BZ - 1956918 - CVE-2018-25010 libwebp: out-of-bounds read in ApplyFilter()
• BZ - 1956922 - CVE-2018-25012 libwebp: out-of-bounds read in WebPMuxCreateInternal()
• BZ - 1956926 - CVE-2018-25013 libwebp: out-of-bounds read in ShiftBytes()
• BZ - 1956927 - CVE-2018-25014 libwebp: use of uninitialized value in ReadSymbol()

CVEs

• CVE-2018-25009
• CVE-2018-25010
• CVE-2018-25012
• CVE-2018-25013
• CVE-2018-25014
• CVE-2020-36330
• CVE-2020-36331
• CVE-2020-36332

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.5_release_notes/