CVE-2021-21289 Command Injection Vulnerability in Mechanize

2021-02-0218:50:13

CWE-78

GitHub_M

www.cve.org

mechanize

command injection

vulnerability

ruby

exploitation

untrusted input

cookiejar

download

file.

CVSS3

7.4

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

8.5

Confidence

High

EPSS

0.003

Percentile

69.7%

JSON

Mechanize is an open-source ruby library that makes automated web interaction easy. In Mechanize from version 2.0.0 and before version 2.7.7 there is a command injection vulnerability. Affected versions of mechanize allow for OS commands to be injected using several classes’ methods which implicitly use Ruby’s Kernel.open method. Exploitation is possible only if untrusted input is used as a local filename and passed to any of these calls: Mechanize::CookieJar#load, Mechanize::CookieJar#save_as, Mechanize#download, Mechanize::Download#save, Mechanize::File#save, and Mechanize::FileResponse#read_body. This is fixed in version 2.7.7.

CNA Affected

[
  {
    "product": "mechanize",
    "vendor": "sparklemotion",
    "versions": [
      {
        "status": "affected",
        "version": ">= 2.0, < 2.7.7"
      }
    ]
  }
]