SB2019021322 - Multiple vulnerabilities in Mozilla Firefox

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Use-after-free error (CVE-ID: CVE-2018-18356)

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to use-after-free error in Skia when handling malicious input. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and cause the browser to crash.

2) Integer overflow (CVE-ID: CVE-2019-5785)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow in the Skia library. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

3) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2018-18511)

The vulnerability allows a remote attacker to bypass same-origin policy.

The vulnerability exists due to an error when processing canvas elements with transferFromImageBitmap method. A remote attacker can create a specially crafted website, trick the victim into visiting it, bypass cross-origin policy and view images loaded in other browser tabs.

Remediation

Install update from vendor's website.

References

• https://www.mozilla.org/en-US/security/advisories/mfsa2019-04/