(RHSA-2021:1791) Moderate: spice-vdagent security and bug fix update

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.