Stack-based buffer overflow in SonicOS - CVE-2021-20046
Published: January 5, 2022
Vulnerability identifier: #VU59235
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-20046
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when when processing HTTP Content-Length response header. A remote unauthenticated attacker can send a specially crafted HTTP response, trigger a stack-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
SonicOS
How to mitigate CVE-2021-20046
Install updates from vendor's website.
SonicOS - update to 6.5.4.9-92n