Stack-based buffer overflow in SonicOS - CVE-2021-20048
Published: January 5, 2022
Vulnerability identifier: #VU59236
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-2021-20048
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 processing SessionID HTTP response header. A remote unauthenticated attacker can send a specially 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-2021-20048
Install updates from vendor's website.
SonicOS - addressed in versions 6.5.4.4-44V-21-1452, 6.5.4.9-92n