Moderate: dbus security update

Topic

An update for dbus is now available for Red Hat Enterprise Linux 9.

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

D-Bus is a system for sending messages between applications. It is used both for the system-wide message bus service, and as a per-user-login-session messaging facility.

Security Fix(es):

• dbus: dbus-daemon crashes when receiving message with incorrectly nested parentheses and curly brackets (CVE-2022-42010)
• dbus: dbus-daemon can be crashed by messages with array length inconsistent with element type (CVE-2022-42011)
• dbus: `_dbus_marshal_byteswap` doesn't process fds in messages with "foreign" endianness correctly (CVE-2022-42012)

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.

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

For the update to take effect, all running instances of dbus-daemon and all running applications using the libdbus library must be restarted, or the system rebooted.

Affected Products

• Red Hat Enterprise Linux for x86_64 9 x86_64
• Red Hat Enterprise Linux for IBM z Systems 9 s390x
• Red Hat Enterprise Linux for Power, little endian 9 ppc64le
• Red Hat Enterprise Linux for ARM 64 9 aarch64

Fixes

• BZ - 2133616 - CVE-2022-42010 dbus: dbus-daemon crashes when receiving message with incorrectly nested parentheses and curly brackets
• BZ - 2133617 - CVE-2022-42011 dbus: dbus-daemon can be crashed by messages with array length inconsistent with element type
• BZ - 2133618 - CVE-2022-42012 dbus: `_dbus_marshal_byteswap` doesn't process fds in messages with "foreign" endianness correctly

CVEs

• CVE-2022-42010
• CVE-2022-42011
• CVE-2022-42012

References

• https://access.redhat.com/security/updates/classification/#moderate