The following data is constructed from data provided by Red Hat's json file at:

https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_6380.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff




====================================================================
Red Hat Security Advisory

Synopsis:           Moderate: runc security update
Advisory ID:        RHSA-2023:6380-01
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2023:6380
Issue date:         2023-11-07
Revision:           01
CVE Names:          CVE-2021-43784
====================================================================

Summary: 

An update for runc 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:

The runC tool is a lightweight, portable implementation of the Open Container Format (OCF) that provides container runtime.

Security Fix(es):

* golang: crypto/tls: large handshake records may cause panics (CVE-2022-41724)

* runc: Rootless runc makes `/sys/fs/cgroup` writable (CVE-2023-25809)

* runc: volume mount race condition (regression of CVE-2019-19921) (CVE-2023-27561)

* runc: AppArmor can be bypassed when `/proc` inside the container is symlinked with a specific mount configuration (CVE-2023-28642)

* runc: integer overflow in netlink bytemsg length field allows attacker to override netlink-based container configuration (CVE-2021-43784)

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 9.3 Release Notes linked from the References section.


Solution:

https://access.redhat.com/articles/11258



CVEs:

CVE-2021-43784

References:

https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.3_release_notes/index