RHSA-2024:9158 - Security Advisory

Topic

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

For 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

• 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 - 1921438 - CVE-2020-27827 lldp/openvswitch: denial of service via externally triggered memory leak
• BZ - 2040388 - CVE-2021-43612 lldpd: out-of-bounds read when decoding SONMP packets
• BZ - 2237411 - CVE-2023-41910 lldpd: CDP PDU Packet cdp.c out-of-bounds read
• RHEL-25990 - Remove networkd gating test
• RHEL-22127 - RHEL 9 is missing lldpd-devel package
• RHEL-5787 - [RFE] lldpd use systemd-sysusers

CVEs

• CVE-2020-27827
• CVE-2021-43612
• CVE-2023-41910

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/9.5_release_notes/index