Threat Encyclopedia

RHSA-2021:1611-Security Advisory

Description

The vulnerabilities in the following products could cause the system to become vulnerable to malicious security attack: systemd

Analysis

The systemd packages contain systemd, a system and service manager for Linux, compatible with the SysV and LSB init scripts. It provides aggressive parallelism capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, and keeps track of processes using Linux cgroups. In addition, it supports snapshotting and restoring of the system state, maintains mount and automount points, and implements an elaborate transactional dependency-based service control logic. It can also work as a drop-in replacement for sysvinit. Security Fix(es): systemd: Spoofing of XDG_SEAT allows for actions to be checked against 'allow_active' instead of 'allow_any' (CVE-2019-3842) systemd: Mishandles numerical usernames beginning with decimal digits or 0x followed by hexadecimal digits (CVE-2020-13776) systemd: Spoofing of XDG_SEAT allows for actions to be checked against 'allow_active' instead of 'allow_any' (CVE-2019-3842) systemd: Mishandles numerical usernames beginning with decimal digits or 0x followed by hexadecimal digits (CVE-2020-13776) 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. SolutionFor 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

systemd

CVE References

CVE-2020-13776 CVE-2019-3842