Sonicwall · Sonicos · CVE-2020-5135
**Name of the Vulnerable Software and Affected Versions**
SonicOS versions 6.0.5.3 and earlier
SonicOS versions 6.5.1.11-4n and earlier
SonicOS versions 6.5.4.7-79n and earlier
SonicOSv versions 6.5.4.4-44v-21-794 and earlier
SonicOS version 7.0.0.0-1
**Description**
A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall. The vulnerability is related to a lack of size checking for copied data. This issue can be exploited without logging in.
**Recommendations**
For SonicOS version 6.0.5.3 and earlier, update to a version that includes the fix for this issue.
For SonicOS version 6.5.1.11-4n and earlier, update to a version that includes the fix for this issue.
For SonicOS version 6.5.4.7-79n and earlier, update to a version that includes the fix for this issue.
For SonicOSv version 6.5.4.4-44v-21-794 and earlier, update to a version that includes the fix for this issue.
For SonicOS version 7.0.0.0-1, update to a version that includes the fix for this issue.
As a temporary workaround, consider restricting access to the vulnerable SonicOS versions until a patch is available.