CVE-2023-45813 Inefficient Regular Expression Complexity in TorBot

2023-10-1820:26:44

CWE-1333

GitHub_M

www.cve.org

torbot

open source

tor network

cve-2023-45813

vulnerability

url validation

denial of service

upgrade

python-validators

regular expression

4.6 Medium

CVSS3

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.0005 Low

EPSS

Percentile

17.1%

JSON

Torbot is an open source tor network intelligence tool. In affected versions the torbot.modules.validators.validate_link function uses the python-validators URL validation regex. This particular regular expression has an exponential complexity which allows an attacker to cause an application crash using a well-crafted argument. An attacker can use a well-crafted URL argument to exploit the vulnerability in the regular expression and cause a Denial of Service on the system. The validators file has been removed in version 4.0.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CNA Affected

[
  {
    "vendor": "DedSecInside",
    "product": "TorBot",
    "versions": [
      {
        "version": "< 4.0.0",
        "status": "affected"
      }
    ]
  }
]