CVE-2019-9813

Incorrect handling of __proto__ mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and write. This vulnerability affects Firefox < 66.0.1, Firefox ESR < 60.6.1, and Thunderbird < 60.6.1.

Score

CVSS 3.0 8.8 High

Status

Modified - security@mozilla.org

Published

2019-04-26

Last modified

2024-08-04

Weaknesses

CWE-843

Affected products

• Firefox (Mozilla)
• Firefox Esr (Mozilla)
• Thunderbird (Mozilla)

References

• https://access.redhat.com/errata/RHSA-2019:0966
• https://access.redhat.com/errata/RHSA-2019:1144
• https://bugzilla.mozilla.org/show_bug.cgi?id=1538006
• https://www.mozilla.org/security/advisories/mfsa2019-09/
• https://www.mozilla.org/security/advisories/mfsa2019-10/
• https://www.mozilla.org/security/advisories/mfsa2019-12/