CVE-2019-17026 in Mozilla and Canonical Products
Published on March 2, 2020
Known Exploited Vulnerability
This Mozilla Firefox IonMonkey JIT compiler Type Confusion Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. This vulnerability affects Firefox ESR < 68.4.1, Thunderbird < 68.4.1, and Firefox < 72.0.1.
The following remediation steps are recommended / required by May 3, 2022: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2019-17026 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is an Object Type Confusion Vulnerability?
The program allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
CVE-2019-17026 has been classified to as an Object Type Confusion vulnerability or weakness.
Products Associated with CVE-2019-17026
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Affected Versions
Mozilla Firefox ESR:- Version unspecified and below 68.4.1 is affected.
- Version unspecified and below 68.4.1 is affected.
- Version unspecified and below 72.0.1 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.