Vulnerability in Mozilla Firefox
CVE-2019-11743
Navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification in some instances for the unload event, which restricts access to detailed timing attributes to only be same-origin. This resulted in potential cross-origin information exposure of history through timing side-channel attacks. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.018 (77.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified, unspecified
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions unspecified, unspecified
Weakness classification (CWE)
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking, Vendor Advisory)
- w3c.github.io/navigation-timing (Exploit, Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2019-25/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-27/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-26/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-29/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-30/ (Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html (vendor-advisory)
Frequently asked questions
- What is CVE-2019-11743?
- CVE-2019-11743 is a low-severity vulnerability in Mozilla Firefox, classified under Observable Discrepancy. CVSS score: 3.7/10. Published 2019-09-27.
- How severe is CVE-2019-11743?
- Low severity. CVSS v3 base score is 3.7 out of 10.