Vulnerability · Published Jan 7, 2022 · Assigned by sonicwall

CVE-2021-20046

High 8.8

In plain English

A high-severity stack buffer overflow in SonicOS from SonicWall. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.0% (higher than 81% of all known vulnerabilities).

Severity (CVSS NVD)8.8High

Exploit odds (30 days)2.0%top 19.1% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

A Stack-based buffer overflow in the SonicOS HTTP Content-Length response header allows a remote authenticated attacker to cause Denial of Service (DoS) and potentially results in code execution in the firewall. This vulnerability affected SonicOS Gen 5, Gen 6 and Gen 7 firmware versions.

Affected products (as reported)

Vendor	Product	Versions
SonicWall	SonicOS	7.0.1-R146 and earlier7.0.1-5023-1349 and earlier7.0.1-5018-R1715 and earlier6.5.4.8-89n and earlier6.5.1.13-1n and earlier6.0.5.3-94o and earlier6.5.4.v_21s-1288 and earlier5.9.1.13 and earlier

Weakness: CWE-121

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0027 x_refsource_CONFIRM