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CVE-2007-6721

10.0 · HIGH

The Legion of the Bouncy Castle Java Cryptography API before release 1.38, as used in Crypto Provider Package before 1.36, has unknown impact and remote attack vectors related to "a Bleichenbacher…

Published Mar 30, 2009bouncycastleEPSS 2.41%

Overview

CVE-2007-6721 is a high-severity vulnerability affecting bouncycastle bc-java. It was published on March 30, 2009 and has a CVSS 2.0 base score of 10.0 (HIGH).

This vulnerability has a CVSS 2.0 base score of 10.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The Legion of the Bouncy Castle Java Cryptography API before release 1.38, as used in Crypto Provider Package before 1.36, has unknown impact and remote attack vectors related to "a Bleichenbacher vulnerability in simple RSA CMS signatures without signed attributes."

Remediation

Check the references section for vendor advisories and patches from bouncycastle. Update bc-java 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

VendorProductVersionsStatus
bouncycastlebc-java0Affected
bouncycastlebouncy-castle-crypto-package0Affected

References

Reffreshmeat.net/projects/bouncycastlecryptoapi/releases/265580Refwww.bouncycastle.org/csharp/Refwww.bouncycastle.org/devmailarchive/msg08195.htmlRefwww.bouncycastle.org/releasenotes.htmlRefwww.osvdb.org/50358Refwww.osvdb.org/50359Refwww.osvdb.org/50360Reffreshmeat.net/projects/bouncycastlecryptoapi/releases/265580Refwww.bouncycastle.org/csharp/Refwww.bouncycastle.org/devmailarchive/msg08195.html

How CyberStrike helps

Frequently asked questions

What is CVE-2007-6721?

CVE-2007-6721 is a high-severity vulnerability affecting bouncycastle bc-java. It was published on March 30, 2009 and has a CVSS 2.0 base score of 10.0 (HIGH).

How severe is CVE-2007-6721?

This vulnerability has a CVSS 2.0 base score of 10.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2007-6721?

Check the references section for vendor advisories and patches from bouncycastle. Update bc-java 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-2007-6721?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2007-6721 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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