SB2020050525 - Use-after-free in firefox-esr (Alpine package)

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Main Vulnerability Database SB2020050525

SB2020050525 - Use-after-free in firefox-esr (Alpine package)

Published: May 5, 2020

Security Bulletin ID SB2020050525
Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Use-after-free (CVE-ID: CVE-2020-12387)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error caused by the race condition when running shutdown code for Web Worker. A remote attacker can create a specially crafted website, trick the victim into visiting it, trigger a use-after-free error and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.


Remediation

Install update from vendor's website.

References