Heap-based buffer overflow in lldpd - CVE-2021-43612
Published: November 18, 2021
Vulnerability identifier: #VU58230
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-43612
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when reading SONMP packets. A remote user can send specially crafted packets to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
lldpd
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Fedora
lldpd
lldpd (Red Hat package)
lldpd-devel
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Fedora
lldpd
lldpd (Red Hat package)
lldpd-devel
How to mitigate CVE-2021-43612
Install updates from vendor's website.
lldpd - update to 1.0.13
lldpd - addressed in versions 1.0.16-1.fc36, 1.0.16-1.fc37, 1.0.16-1.fc38
lldpd (Red Hat package) - update to 1.0.18-4.el9
lldpd - update to 1.0.18-4.0.1
lldpd-devel - update to 1.0.18-4.0.1
lldpd - addressed in versions 1.0.16-1.fc36, 1.0.16-1.fc37, 1.0.16-1.fc38
lldpd (Red Hat package) - update to 1.0.18-4.el9
lldpd - update to 1.0.18-4.0.1
lldpd-devel - update to 1.0.18-4.0.1