A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop. This can allow for an exploitable crash. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 60.7.1, Firefox < 67.0.3, and Thunderbird < 60.7.2.
Published 2019-07-23 14:15:15
Updated 2025-02-07 13:15:26
View at NVD,   CVE.org

Products affected by CVE-2019-11707

CVE-2019-11707 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
Mozilla Firefox and Thunderbird Type Confusion Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
Mozilla Firefox and Thunderbird contain a type confusion vulnerability that can occur when manipulating JavaScript objects due to issues in Array.pop, allowing for an exploitable crash.
Notes:
https://nvd.nist.gov/vuln/detail/CVE-2019-11707
Added on 2022-05-23 Action due date 2022-06-13

Exploit prediction scoring system (EPSS) score for CVE-2019-11707

68.64%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 98 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-11707

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
NIST
8.8
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
2.8
5.9
134c704f-9b21-4f2e-91b3-4a467353bcc0 2025-02-07
8.8
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
2.8
5.9
NIST

CWE ids for CVE-2019-11707

  • The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
    Assigned by:
    • 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
    • nvd@nist.gov (Primary)

References for CVE-2019-11707

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