Remote code execution in wolfSSL

Published: 2021-02-02
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-36177
Exploitation vector Network
Public exploit N/A
Vulnerable software
Universal components / Libraries / Libraries used by multiple products

Vendor wolfSSL

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Out-of-bounds write

EUVDB-ID: #VU50252

Risk: High


CVE-ID: CVE-2020-36177

CWE-ID: CWE-787 - Out-of-bounds Write

Exploit availability: No


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input for certain relationships between key size and digest size within the RsaPad_PSS() function in wolfcrypt/src/rsa.c in wolfSSL. A remote attacker can send specially crafted data to the application, trigger out-of-bounds write and execute arbitrary code on the target system.


Install updates from vendor's website.

Vulnerable software versions

wolfSSL: 2.0.3 - 4.5.0

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?