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CVE-2024-39312— Botan has an Authorization Error due to Name Constraint Decoding Bug

Quick assessment

Affected
randombit botan
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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X.509证书中的名称约束扩展解析中存在一个错误，这意味着如果扩展同时包含“permitted subtrees”和“excluded subtrees”，则只会检查“permitted subtrees”。

CVSS 5.3 · Medium EPSS 0.27% · P20

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2024-39312

Vulnerability Information
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Vulnerability Title
Botan has an Authorization Error due to Name Constraint Decoding Bug
Source: CVE Program / CVE List V5
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. A bug in the parsing of name constraint extensions in X.509 certificates meant that if the extension included both permitted subtrees and excluded subtrees, only the permitted subtree would be checked. If a certificate included a name which was permitted by the permitted subtree but also excluded by excluded subtree, it would be accepted. Fixed in versions 3.5.0 and 2.19.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Botan 安全漏洞
Source: CNNVD (China National Vulnerability Database)
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X.509证书中的名称约束扩展解析中存在一个错误，这意味着如果扩展同时包含“permitted subtrees”和“excluded subtrees”，则只会检查“permitted subtrees”。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
randombit botan < 2.19.5 -

II. Public POCs for CVE-2024-39312

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III. Intelligence Information for CVE-2024-39312

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Vendor Advisories for CVE-2024-39312 (1)

IV. Related Vulnerabilities

Same product: botan
Same vendor: randombit
Same weakness: CWE-295

V. Comments for CVE-2024-39312

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