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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.019 (78.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
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
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required)
- www.mozilla.org/security/advisories/mfsa2019-36/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-38/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-37/ (Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.html (vendor-advisory, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4241-1/ (vendor-advisory)
- access.redhat.com/errata/RHSA-2020:0292 (vendor-advisory)
- access.redhat.com/errata/RHSA-2020:0295 (vendor-advisory)
- security.gentoo.org/glsa/202003-02 (vendor-advisory)
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.