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

2024-07-0816:30:25

CWE-295

GitHub_M

github.com

botan

authorization error

x.509

parsing

bug

name constraint

decoding bug

subtrees

certificates

cryptography

library

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

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

AI Score

Confidence

Low

EPSS

Percentile

9.2%

SSVC

Exploitation

none

Automatable

yes

Technical Impact

partial

JSON

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.

CNA Affected

[
  {
    "vendor": "randombit",
    "product": "botan",
    "versions": [
      {
        "status": "affected",
        "version": "< 2.19.5"
      },
      {
        "status": "affected",
        "version": ">= 3.0.0, < 3.5.0"
      }
    ]
  }
]

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:a:randombit:botan:*:*:*:*:*:*:*:*"
    ],
    "vendor": "randombit",
    "product": "botan",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "2.19.5",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "3.0.0",
        "lessThan": "3.5.0",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unknown"
  }
]