SB2021020215 - Remote code execution in wolfSSL
Published: February 2, 2021
Security Bulletin ID
SB2021020215
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2020-36177)
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.
Remediation
Install update from vendor's website.
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26567
- https://github.com/wolfSSL/wolfssl/commit/63bf5dc56ccbfc12a73b06327361687091a4c6f7
- https://github.com/wolfSSL/wolfssl/commit/fb2288c46dd4c864b78f00a47a364b96a09a5c0f
- https://github.com/wolfSSL/wolfssl/pull/3426
- https://github.com/wolfSSL/wolfssl/releases/tag/v4.6.0-stable