CVE-2024-39312: botan Cert Validation Flaw (CVSS 5.3)

Description

Botan is a C++ cryptography library. X.509 certificates can identify elliptic curves using either an object identifier or using explicit encoding of the parameters. A bug in the parsing of name constraint extensions in X.509 certificates meant that if the extension included both permitted subtrees and excluded subtrees, only the permitted subtree would be checked. If a certificate included a name which was permitted by the permitted subtree but also excluded by excluded subtree, it would be accepted. Fixed in versions 3.5.0 and 2.19.5.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness Type (CWE)

CWE-295 CWE-295

Affected Products

Vendor	Product	Versions
botan_project	botan	< 2.19.5
botan_project	botan	3.0.0 — 3.5.0

References

Other References

https://github.com/randombit/botan/security/advisories/GHSA-jp24-56jm-gg86 https://github.com/randombit/botan/security/advisories/GHSA-jp24-56jm-gg86

Frequently Asked Questions

What is CVE-2024-39312? +

Botan is a C++ cryptography library. X.509 certificates can identify elliptic curves using either an object identifier or using explicit encoding of the parameters. A bug in the parsing of name constraint extensions in X.509 certificates meant that if the extension included both permitted subtrees and excluded subtrees, only the permitted subtree would be checked. If a certificate included a name which was permitted by the permitted subtree but also excluded by excluded subtree, it would be accepted. Fixed in versions 3.5.0 and 2.19.5. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2024-39312? +

CVE-2024-39312 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-39312? +

CVE-2024-39312 affects products from botan_project, specifically: botan. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-39312? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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