High severity · published Mar 2, 2020
CVE-2019-17026
Mozilla Firefox And Thunderbird Type Confusion Vulnerability
In wildKEV
8.8
CVSS
46.3%
EPSS
Yes
On KEV
Description
Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 68.4.1, Thunderbird < 68.4.1, and Firefox < 72.0.1.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)46.3% · higher than 99% of CVEs
Exploited in the wildYes
CISA KEVListed Nov 3, 2021
Federal remediation dueMay 3, 2022
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 72.0.1 · source: vendor, NVD
FE
Firefox ESR · Mozilla
before 68.4.1 · source: vendor
TH
Thunderbird · Mozilla
before 68.4.1 · source: vendor, NVD
UL
Ubuntu Linux · Canonical
16.04 · source: NVD
FA
Firefox and Thunderbird · Mozilla
All versions, or not specified · source: KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-17026
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-17026
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://www.mozilla.org/security/advisories/mfsa2020-04/
x_refsource_MISC
https://www.mozilla.org/security/advisories/mfsa2020-03/
x_refsource_MISC
https://bugzilla.mozilla.org/show_bug.cgi?id=1607443
vendor-advisory
https://security.gentoo.org/glsa/202003-02
vendor-advisory
https://usn.ubuntu.com/4335-1/
x_refsource_MISC
http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html
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