CVEs / CVE-2019-11707
CVE-2019-11707: Mozilla Firefox and Thunderbird Type Confusion Vulnerability
- Known exploited in the CISA KEV catalog since 23 May 2022
- high 8.8 CVSS 3.1 (NVD)
- EPSS 37.9% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
Are you affected? Check your servers with Stackurity: it lists the software on each server and the vulnerabilities to fix first.
Check your servers with Stackurity Already using Stackurity? Search for CVE-2019-11707
Summary
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.
Description
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Mozilla Firefox ESR | from unspecified, before 60.7.1 | 60.7.1 |
| Mozilla Firefox | from unspecified, before 67.0.3 | 67.0.3 |
| Mozilla Thunderbird | from unspecified, before 60.7.2 | 60.7.2 |
Exploitation
| In CISA KEV since | 23 May 2022 |
|---|---|
| Due date for US federal agencies | 13 Jun 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 8.8 highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-843 |
References
- CVE-2019-11707 on NVD
- CVE-2019-11707 in the CISA KEV catalog
- CVE-2019-11707 on OSV
- https://bugzilla.mozilla.org/show_bug.cgi?id=1544386 Issue Tracking, Permissions Required, Vendor Advisory
- https://security.gentoo.org/glsa/201908-12 Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-18/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-20/ Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-11707 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.