Vulnerability Information
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Vulnerability Title
Botan Vulnerable to Denial of Service Due to Overly Large Elliptic Curve Parameters
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 versions 3.3.0 and 2.19.4, an attacker could present an ECDSA X.509 certificate using explicit encoding where the parameters are very large. The proof of concept used a 16Kbit prime for this purpose. When parsing, the parameter is checked to be prime, causing excessive computation. This was patched in 2.19.4 and 3.3.0 to allow the prime parameter of the elliptic curve to be at most 521 bits. No known workarounds are available. Note that support for explicit encoding of elliptic curve parameters is deprecated in Botan.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability Type
不对称的资源消耗(放大攻击)
Vulnerability Title
Botan 安全漏洞
Vulnerability Description
Botan是一款使用C++编写的加密算法库。该产品支持AES、DES、SHA-1、RSA、DSA和Diffie-Hellman等多种算法。 Botan存在安全漏洞，该漏洞源于允许使用显式编码来出示 ECDSA X.509 证书，在解析时，会检查参数是否为素数，从而导致计算量过大。
CVSS Information
N/A
Vulnerability Type
N/A