CVE-2024-34702: randombit botan

Vulnerability summary

CVE-2024-34702 is a medium (CVSS 5.3) vulnerability in randombit botan. EPSS estimates a 0.84% chance of exploitation in the next 30 days, higher than 57.6% of scored vulnerabilities.

Timeline

1. 08-07-2024
   PublishedVulnerability first disclosed.
2. 02-08-2024
   Last modifiedVulnerability information updated.

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.

• CWE-405Asymmetric Resource Consumption (Amplification)The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric."