CVE-2019-17026

Summary

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.

Affected Software

Weaknesses

• IonMonkey type confusion with StoreElementHole and FallibleStoreElement

ADP Enrichment

CVE Program Container

Additional References

• https://www.mozilla.org/security/advisories/mfsa2020-04/
• https://www.mozilla.org/security/advisories/mfsa2020-03/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1607443
• https://security.gentoo.org/glsa/202003-02
• https://usn.ubuntu.com/4335-1/
• http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html

CISA ADP Vulnrichment

• SSVC:
• Exploitation: active
  • Automatable: no
  • Technical Impact: total

Additional References

• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17026

References

• https://www.mozilla.org/security/advisories/mfsa2020-04/
• https://www.mozilla.org/security/advisories/mfsa2020-03/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1607443
• https://security.gentoo.org/glsa/202003-02
• https://usn.ubuntu.com/4335-1/
• http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html

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