SB2019050638 - Exposed dangerous method or function in python2-tkinter (Alpine package)

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Main Vulnerability Database SB2019050638

SB2019050638 - Exposed dangerous method or function in python2-tkinter (Alpine package)

Published: May 6, 2019

Security Bulletin ID SB2019050638
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Exposed dangerous method or function (CVE-ID: CVE-2019-9948)

CWE-ID: CWE-749 - Exposed Dangerous Method or Function

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Green


The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to urllib implementation in Python 2.x supports the local_file: scheme. An attacker with ability to control input data, such as URL, can bypass protection mechanisms that blacklist file: URIs and view contents of arbitrary file on the system.

PoC: 

urllib.urlopen('local_file:///etc/passwd')

Remediation

Install update from vendor's website.

References