RHSA-2021:1791 - Security Advisory

Topic

An update for spice-vdagent 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 spice-vdagent packages provide a SPICE agent for Linux guests.

Security Fix(es):

• spice-vdagent: possible file transfer DoS and information leak via active_xfers hash map (CVE-2020-25651)
• spice-vdagent: UNIX domain socket peer PID retrieved via SO_PEERCRED is subject to race condition (CVE-2020-25653)
• spice-vdagent: memory DoS via arbitrary entries in active_xfers hash table (CVE-2020-25650)
• spice-vdagent: possibility to exhaust file descriptors in vdagentd (CVE-2020-25652)

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 8.4 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 for x86_64 - Extended Update Support 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.6 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 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 IBM z Systems - Extended Update Support 8.4 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 for Power, little endian - Extended Update Support 8.4 ppc64le
• Red Hat Enterprise Linux Server - TUS 8.6 x86_64
• Red Hat Enterprise Linux Server - TUS 8.4 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 for ARM 64 - Extended Update Support 8.4 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.6 ppc64le
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.4 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.4 x86_64

Fixes

• BZ - 1790904 - [wayland] Multiple displays: mouse coordinates taken from the other display
• BZ - 1824610 - [wayland] 3. and 4. spice display does not react to mouse interaction
• BZ - 1886345 - CVE-2020-25650 spice-vdagent: memory DoS via arbitrary entries in active_xfers hash table
• BZ - 1886359 - CVE-2020-25651 spice-vdagent: possible file transfer DoS and information leak via active_xfers hash map
• BZ - 1886366 - CVE-2020-25652 spice-vdagent: possibility to exhaust file descriptors in vdagentd
• BZ - 1886372 - CVE-2020-25653 spice-vdagent: UNIX domain socket peer PID retrieved via SO_PEERCRED is subject to race condition

CVEs

• CVE-2020-25650
• CVE-2020-25651
• CVE-2020-25652
• CVE-2020-25653

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/