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CVE-2019-17026

Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion.

Published
Last modified
published
Listed in CISA KEV
Fix
Fixed in 68.4.1, 72.0.1
None on Exploit-DB, Metasploit or GitHub

Summary

Mozilla Firefox (including the Extended Support Release edition) and Mozilla Thunderbird are affected. A flaw in the JavaScript engine's just-in-time compiler can cause type confusion, which may allow an attacker to crash the software or potentially run malicious code.

Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.

Read the original 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.

Timeline

  1. CVE published
  2. Added to CISA KEV

    CISA has evidence of exploitation in the wild

  3. CISA remediation deadline

    Due date for US federal agencies to patch

  4. Record last updated
  5. EPSS reached 10%

    FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

  • Mozilla Firefox ESR

    From unspecified · fixed in 68.4.1

  • Mozilla Thunderbird

    From unspecified · fixed in 68.4.1

  • Mozilla Firefox

    From unspecified · fixed in 72.0.1

References 6

mozilla.org

bugzilla.mozilla.org

security.gentoo.org

usn.ubuntu.com

packetstormsecurity.com