CVE-2020-7066 get_headers() silently truncates after a null byte

2020-03-1700:00:00

CWE-170

php

www.cve.org

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

6.8 Medium

AI Score

Confidence

High

0.006 Low

EPSS

Percentile

78.2%

JSON

In PHP versions 7.2.x below 7.2.29, 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using get_headers() with user-supplied URL, if the URL contains zero (\0) character, the URL will be silently truncated at it. This may cause some software to make incorrect assumptions about the target of the get_headers() and possibly send some information to a wrong server.

CNA Affected

[
  {
    "product": "PHP",
    "vendor": "PHP Group",
    "versions": [
      {
        "status": "affected",
        "version": "7.2.x below 7.2.29"
      },
      {
        "status": "affected",
        "version": "7.3.x below 7.3.16"
      },
      {
        "status": "affected",
        "version": "7.4.x below 7.4.4"
      }
    ]
  }
]