CVE-2022-31630 OOB read due to insufficient input validation in imageloadfont()

2022-11-1406:53:06

CWE-190

CWE-131

php

www.cve.org

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

LOW

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

8.3 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

34.3%

JSON

In PHP versions prior to 7.4.33, 8.0.25 and 8.1.12, when using imageloadfont() function in gd extension, it is possible to supply a specially crafted font file, such as if the loaded font is used with imagechar() function, the read outside allocated buffer will be used. This can lead to crashes or disclosure of confidential information.

CNA Affected

[
  {
    "defaultStatus": "unaffected",
    "modules": [
      "gd"
    ],
    "product": "PHP",
    "repo": "https://github.com/php/php-src",
    "vendor": "PHP Group",
    "versions": [
      {
        "lessThan": "7.4.33",
        "status": "affected",
        "version": "7.4.x",
        "versionType": "custom"
      },
      {
        "lessThan": "8.0.25",
        "status": "affected",
        "version": "8.0.x",
        "versionType": "custom"
      },
      {
        "lessThan": "8.1.12",
        "status": "affected",
        "version": "8.1.x",
        "versionType": "custom"
      }
    ]
  }
]