The following advisory data is extracted from:

https://security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_9158.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




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Red Hat Security Advisory

Synopsis:           Moderate: lldpd security update
Advisory ID:        RHSA-2024:9158-03
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2024:9158
Issue date:         2024-11-12
Revision:           03
CVE Names:          CVE-2020-27827
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Summary: 

An update for lldpd 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:

LLDP is an industry standard protocol designed to supplant proprietary Link-Layer protocols such as EDP or CDP. The goal of LLDP is to provide an inter-vendor compatible mechanism to deliver Link-Layer notifications to adjacent network devices.

Security Fix(es):

* lldp/openvswitch: denial of service via externally triggered memory leak (CVE-2020-27827)

* lldpd: out-of-bounds read when decoding SONMP packets (CVE-2021-43612)

* lldpd: CDP PDU Packet cdp.c out-of-bounds read (CVE-2023-41910)

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 9.5 Release Notes linked from the References section.


Solution:

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



CVEs:

CVE-2020-27827

References:

https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/9.5_release_notes/index
https://access.redhat.com/security/updates/classification/#moderate
https://bugzilla.redhat.com/show_bug.cgi?id=1921438
https://bugzilla.redhat.com/show_bug.cgi?id=2040388
https://bugzilla.redhat.com/show_bug.cgi?id=2237411
https://issues.redhat.com/browse/RHEL-22127
https://issues.redhat.com/browse/RHEL-25990
https://issues.redhat.com/browse/RHEL-5787