CVE-2019-11707
Confirmed PUBLISHEDA type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop. This can allow for an exploitable crash....
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Jul 23, 2019
- Exploitation Reported
- May 23, 2022
- CVSS
- 8.8 High
- EPSS
- —
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| Mozilla |
Firefox ESR
|
unspecified to < 60.7.1 |
Affected |
| Mozilla |
Firefox
|
unspecified to < 67.0.3 |
Affected |
| Mozilla |
Thunderbird
|
unspecified to < 60.7.2 |
Affected |
CVE References
- GLSA-201908-12 security.gentoo.org · Vendor Advisory https://security.gentoo.org/glsa/201908-12
- mozilla.org/security/advisories/mfsa2019-20 mozilla.org · CVE Record https://www.mozilla.org/security/advisories/mfsa2019-20/
- mozilla.org/security/advisories/mfsa2019-18 mozilla.org · CVE Record https://www.mozilla.org/security/advisories/mfsa2019-18/
- bugzilla.mozilla.org/show_bug.cgi bugzilla.mozilla.org · CVE Record https://bugzilla.mozilla.org/show_bug.cgi?id=1544386
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2022-05-23 00:00 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
Exploitation Status
Exploited in the wild
Recorded 2022-05-23 00:00:00 UTC · CISA
Proof of concept available
Recorded 2019-08-18 07:41:01 UTC · GitHub
Weaknesses (CWE)
-
Access of Resource Using Incompatible Type ('Type Confusion')
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2019-08-18 07:41:01 UTC · 42 stars
Exploit code for CVE-2019-11707 on Firefox 66.0.3 running on Ubuntu
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
00:00 UTC about 4 years ago00:00 UTC · about 4 years ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
07:41 UTC almost 7 years ago07:41 UTC · almost 7 years ago
Public PoC available
Public proof-of-concept code published
-
13:20 UTC almost 7 years ago13:20 UTC · almost 7 years ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC about 7 years ago00:00 UTC · about 7 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2019-11707
{
"cve_id": "CVE-2019-11707",
"title": "A type confusion vulnerability can occur when manipulating JavaScript objects...",
"affected_vendor": "Mozilla",
"affected_product": "Firefox ESR, Firefox, Thunderbird",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 8.8,
"epss_score": null,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}