SB2020090421 - Privilege escalation in Bundler

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Main Vulnerability Database SB2020090421

SB2020090421 - Privilege escalation in Bundler

Published: September 4, 2020 Updated: January 8, 2021

Security Bulletin ID SB2020090421
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Files or Directories Accessible to External Parties (CVE-ID: CVE-2019-3881)

CWE-ID: CWE-552 - Files or Directories Accessible to External Parties

CVSSv4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to Bundler uses a predictable path in /tmp/, created with insecure permissions as a storage location for gems, if locations under the user's home directory are not available. If Bundler is used in a scenario where the user does not have a writable home directory, an attacker could place malicious code in this directory that would be later loaded and executed.


Remediation

Install update from vendor's website.

References