What is CVE-2020-5136?

CVE-2020-5136 is a medium-severity vulnerability in Sonicwall Sonicos, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2020-10-12.

How severe is CVE-2020-5136?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Sonicwall Sonicos

CVE-2020-5136

A buffer overflow vulnerability in SonicOS allows an authenticated attacker to cause Denial of Service (DoS) in the SSL-VPN and virtual assist portal, which leads to a firewall crash. This vulnerability affected SonicOS Gen 5 version 5.9.1…

Vulnerability class: Buffer Overflow

EPSS: 0.011 (62.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Sonicwall Sonicos — versions SonicOS 5.9.1.13-5n and earlier, SonicOS 6.5.4.7-79n and earlier, 7.0.0.0
Sonicwall Sonicosv

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

PSIRT@sonicwall.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2020-5136?: CVE-2020-5136 is a medium-severity vulnerability in Sonicwall Sonicos, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2020-10-12.
How severe is CVE-2020-5136?: Medium severity. CVSS v3 base score is 6.5 out of 10.