Vulnerability in Mozilla Firefox
CVE-2019-9811
As part of a winning Pwn2Own entry, a researcher demonstrated a sandbox escape by installing a malicious language pack and then opening a browser feature that used the compromised translation. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.026 (85.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions unspecified
- Novell SUSE Package Hub For Linux Enterprise — versions 12
- Debian Linux — versions 8.0
- openSUSE Leap — versions 15.0, 15.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.mozilla.org/security/advisories/mfsa2019-21/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-22/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-23/ (Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- bugzilla.mozilla.org/show_bug.cgi (Exploit, Patch, Issue Tracking, Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Exploit, Issue Tracking, Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.html (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.html (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/08/msg00001.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/08/msg00002.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-9811?
- CVE-2019-9811 is a high-severity vulnerability in Mozilla Firefox, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 8.3/10. Published 2019-07-23.
- How severe is CVE-2019-9811?
- High severity. CVSS v3 base score is 8.3 out of 10.
- Is CVE-2019-9811 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.