CVE-2019-9813

high

Description

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.

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/

Details

Source: MITRE

Published: 2019-04-26

Updated: 2020-08-24

Type: CWE-843

Risk Information

CVSS v2

Base Score: 6.8

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 2.8

Severity: HIGH