CVE-2021-32706 (Authenticated) Remote Code Execution Possible in Web Interface 5.5

2021-08-0417:50:09

CWE-94

GitHub_M

www.cve.org

cve-2021-32706

remote code execution

pi-hole web interface 5.5

patch

vulnerability

CVSS3

7.6

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

HIGH

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

AI Score

8.9

Confidence

High

EPSS

0.009

Percentile

82.6%

JSON

Pi-hole’s Web interface provides a central location to manage a Pi-hole instance and review performance statistics. Prior to Pi-hole Web interface version 5.5.1, the validDomainWildcard preg_match filter allows a malicious character through that can be used to execute code, list directories, and overwrite sensitive files. The issue lies in the fact that one of the periods is not escaped, allowing any character to be used in its place. A patch for this vulnerability was released in version 5.5.1.

CNA Affected

[
  {
    "product": "AdminLTE",
    "vendor": "pi-hole",
    "versions": [
      {
        "status": "affected",
        "version": "< 5.5.1"
      }
    ]
  }
]