Out-of-Bounds Write Vulnerability in wolfSSL Affected by Key and Digest Size Relationship
CVE-2020-36177

9.8CRITICAL

Key Information:

Vendor

Wolfssl

Status
Wolfssl
Vendor
CVE Published:
6 January 2021

What is CVE-2020-36177?

The wolfSSL library contains an out-of-bounds write vulnerability in the RsaPad_PSS function located in the rsa.c file. This issue arises when specific relationships between the key size and digest size are not properly handled, potentially allowing for unintended memory access and manipulation. This vulnerability impacts versions of wolfSSL before 4.6.0, underscoring the importance of upgrading to the latest version to mitigate security risks.

References

https://github.com/wolfSSL/wolfssl/commit/63bf5dc56ccbfc1...
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https://github.com/wolfSSL/wolfssl/pull/3426
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https://github.com/wolfSSL/wolfssl/commit/fb2288c46dd4c86...
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CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2020-36177 : Out-of-Bounds Write Vulnerability in wolfSSL Affected by Key and Digest Size Relationship