CVE-2021-20043: sonicwall sma_200_firmware Heap-based Buffer Overflow

Vulnerability summary

CVE-2021-20043 is a high (CVSS 8.8) Heap-based Buffer Overflow vulnerability in sonicwall sma_200_firmware. EPSS estimates a 23.26% chance of exploitation in the next 30 days, higher than 97.7% of scored vulnerabilities.

Timeline

1. 08-12-2021
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

Description

A Heap-based buffer overflow vulnerability in SonicWall SMA100 getBookmarks method allows a remote authenticated attacker to potentially execute code as the nobody user in the appliance. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.