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CVE
PUBLISHED

CVE-2024-34702

Botan has a Denial of Service Due to Excessive Name Constraints

AssignerGitHub_M
Reserved2024-05-07
Published2024-07-08
Updated2024-07-08

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.



MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Problem types

CWE-405: Asymmetric Resource Consumption (Amplification)

Product status

< 2.19.5
affected

>= 3.0.0, < 3.5.0
affected

References

https://github.com/randombit/botan/security/advisories/GHSA-5gg9-hqpr-r58j

https://github.com/randombit/botan/pull/4034

https://github.com/randombit/botan/pull/4045

https://github.com/randombit/botan/pull/4047

https://github.com/randombit/botan/pull/4052

https://github.com/randombit/botan/pull/4186

https://github.com/randombit/botan/pull/4187

https://github.com/randombit/botan/commit/21dccc8fef18c165ba3301d850ac61521f85637e

https://github.com/randombit/botan/commit/39535f13c322f56aa3da2f44b2b6abb8619a82ac

https://github.com/randombit/botan/commit/477822a2d10f02d8ba46c9d8a5132f25843f5cc1

https://github.com/randombit/botan/commit/7606d70d3a2ac7114476ec2651ca0243c4536fdf

https://github.com/randombit/botan/commit/c3264821b9f6286ee4e6e3e06826f6b7177e6d41

https://github.com/randombit/botan/commit/ff704b12e6fa351aaedd07bffdc91722e84586b8

cve.org CVE-2024-34702

nvd.nist.gov CVE-2024-34702

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