CVE-2024-2757 PHP mb_encode_mimeheader runs endlessly for some inputs

2024-04-2903:49:15

php

github.com

php

mb_encode_mimeheader

dos

cve-2024-2757

security

vulnerability

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

6.7 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.7%

JSON

In PHP 8.3.* before 8.3.5, function mb_encode_mimeheader() runs endlessly for some inputs that contain long strings of non-space characters followed by a space. This could lead to a potential DoS attack if a hostile user sends data to an application that uses this function.

CNA Affected

[
  {
    "vendor": "PHP Group",
    "product": "PHP",
    "versions": [
      {
        "status": "affected",
        "version": "8.3.*",
        "lessThan": "8.3.5",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]