CVE-2019-17026

high-risk
Published 2020-03-02

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.

Do I need to act?

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64.8% chance of exploitation in next 30 days
EPSS score — higher than 35% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
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1 public exploit available
49864
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (4)

Affected Vendors

Mozilla Canonical

References (13)

Exploit http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confus...
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1607443
Third Party Advisory https://security.gentoo.org/glsa/202003-02
Third Party Advisory https://usn.ubuntu.com/4335-1/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-03/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-04/
Exploit http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confus...
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1607443
Third Party Advisory https://security.gentoo.org/glsa/202003-02
Third Party Advisory https://usn.ubuntu.com/4335-1/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-03/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-04/
US Government Resource https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-...
66
/ 100
high-risk
Severity 30/34 · Critical
Exploitability 26/34 · High
Exposure 10/34 · Low