SB2019032206 - Multiple vulnerabilities in Mozilla Firefox and Firefox ESR

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Buffer overflow (CVE-ID: CVE-2019-9810)

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

The vulnerability exists due to a boundary error when processing incorrect information alias in IonMonkey JIT compiler for Array.prototype.slice method. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger memory corruption and execute arbitrary code on the target system.

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

2) Type Confusion (CVE-ID: CVE-2019-9813)

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

The vulnerability exists due to a type confusion error when handling proto mutations in IonMonkey JIT code. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger a type confusion error and execute arbitrary code on the target system.

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

Remediation

Install update from vendor's website.

References

• https://www.mozilla.org/en-US/security/advisories/mfsa2019-09/
• https://www.mozilla.org/en-US/security/advisories/mfsa2019-10/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1537924
• https://bugzilla.mozilla.org/show_bug.cgi?id=1538006