Vulnerability Information
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Vulnerability Title
leancrypto: Integer truncation in X.509 name parser enables certificate identity impersonation
Vulnerability Description
The leancrypto library is a cryptographic library that exclusively contains only PQC-resistant cryptographic algorithms. Prior to version 1.7.1, lc_x509_extract_name_segment() casts size_t vlen to uint8_t when storing the Common Name (CN) length. An attacker who crafts a certificate with CN = victim's CN + 256 bytes padding gets cn_size = (uint8_t)(256 + N) = N, where N is the victim's CN length. The first N bytes of the attacker's CN are the victim's identity. After parsing, the attacker's certificate has an identical CN to the victim's — enabling identity impersonation in PKCS#7 verification, certificate chain matching, and code signing. This issue has been patched in version 1.7.1.
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Vulnerability Type
数值类型间的不正确转换
Vulnerability Title
Lean Crypto Library 安全漏洞
Vulnerability Description
Lean Crypto Library是smuellerDD个人开发者的一个轻量级抗量子密码算法库。 Lean Crypto Library 1.7.1之前版本存在安全漏洞，该漏洞源于lc_x509_extract_name_segment函数将size_t转换为uint8_t时存在整数溢出，可能导致身份冒充。
CVSS Information
N/A
Vulnerability Type
N/A