CVE-2023-0656: sonicwall sonicos Stack-based Buffer Overflow

Vulnerability summary

CVE-2023-0656 is a high (CVSS 7.5) Stack-based Buffer Overflow vulnerability in sonicwall sonicos. EPSS estimates a 41.32% chance of exploitation in the next 30 days, higher than 98.6% of scored vulnerabilities.

Timeline

1. 02-03-2023
   PublishedVulnerability first disclosed.
2. 07-03-2025
   Last modifiedVulnerability information updated.

Description

A Stack-based buffer overflow vulnerability in the SonicOS allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause an impacted firewall to crash.

• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.