Use After Free in Mozilla Firefox
CVE-2019-17008
When using nested workers, a use-after-free could occur during worker destruction. This resulted in a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.
Vulnerability class: Use-After-Free
EPSS: 0.019 (77.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Mozilla Firefox — versions before 71
- Mozilla Firefox Esr — versions before 68.3
- Mozilla Firefox_esr
- Mozilla Thunderbird — versions before 68.3
- Opensuse Leap — versions 15.1
Weakness classification (CWE)
References
- security@mozilla.org (Permissions Required, x_refsource_MISC)
- security@mozilla.org (x_refsource_CONFIRM, Vendor Advisory)
- security@mozilla.org (x_refsource_CONFIRM, Vendor Advisory)
- security@mozilla.org (x_refsource_CONFIRM, Vendor Advisory)
- security@mozilla.org (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
- security@mozilla.org (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
- security@mozilla.org (x_refsource_UBUNTU, vendor-advisory)
- security@mozilla.org (x_refsource_REDHAT, vendor-advisory)
- security@mozilla.org (x_refsource_REDHAT, vendor-advisory)
- security@mozilla.org (vendor-advisory, x_refsource_GENTOO)
Frequently asked questions
- What is CVE-2019-17008?
- CVE-2019-17008 is a high-severity vulnerability in Mozilla Firefox, classified under Use After Free. CVSS score: 8.8/10. Published 2020-01-08.
- How severe is CVE-2019-17008?
- High severity. CVSS v3 base score is 8.8 out of 10.