CVE-2020-15522
5.9 · MEDIUMOverview
CVE-2020-15522 is a medium-severity vulnerability affecting bouncycastle bc-csharp. It was published on May 20, 2021 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Bouncy Castle BC Java before 1.66, BC C# .NET before 1.8.7, BC-FJA before 1.0.1.2, 1.0.2.1, and BC-FNA before 1.0.1.1 have a timing issue within the EC math library that can expose information about the private key when an attacker is able to observe timing information for the generation of multiple deterministic ECDSA signatures.
Remediation
Check the references section for vendor advisories and patches from bouncycastle. Update bc-csharp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| bouncycastle | bc-csharp | >= 0, < 1.8.7 | Affected |
| bouncycastle | bouncy_castle_fips_.net_api | >= 0, < 1.0.1.1 | Affected |
| bouncycastle | fips_java_api | >= 0, < 1.0.1.2 | Affected |
| bouncycastle | the_bouncy_castle_crypto_package_for_java | >= 0, < 1.66 | Affected |
References
Frequently Asked Questions
What is CVE-2020-15522?
CVE-2020-15522 is a medium-severity vulnerability affecting bouncycastle bc-csharp. It was published on May 20, 2021 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
How severe is CVE-2020-15522?
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-15522?
Check the references section for vendor advisories and patches from bouncycastle. Update bc-csharp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-15522?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-15522 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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