CVE-2024-34702 - CVE House
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Status published Medium CVE-2024-34702

Botan has a Denial of Service Due to Excessive Name Constraints

Vulnerability 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. Prior to 3.5.0 and 2.19.5, checking name constraints in X.509 certificates is quadratic in the number of names and name constraints. An attacker who presented a certificate chain which contained a very large number of names in the SubjectAlternativeName, signed by a CA certificate which contained a large number of name constraints, could cause a denial of service. The problem has been addressed in Botan 3.5.0 and a partial backport has also been applied and is included in Botan 2.19.5.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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CVE-2024-39312
Botan has an Authorization Error due to Name Constraint Decoding Bug
Medium 5.3
CVE-2024-34703
Botan Vulnerable to Denial of Service Due to Overly Large Elliptic Curve Parameters
High 7.5

Affected Vendor

Affected Software

botan
Vulnerable Versions:
< 2.19.5, >= 3.0.0, < 3.5.0

Timeline

Official Publish: July 8th, 2024
Last Modified: August 2nd, 2024
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weaknesses (CWE)

CWE-405

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.