CVE-2019-11707highunder attackCWE-843

CVE-2019-11707: high-severity vulnerability in Mozilla Firefox

Published · Updated

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85Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.

ssvc Actcvss 8.8epss 38%
from disclosure to weaponsame day
Published on NVDJul 23
1st PoCJun 26
CISA KEV+1035d
What the vendors declare (VEX)

Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.

Red HatVEX document ↗
Fixed
16 products (229 components)
Red Hat Enterprise Linux AppStream (v. 8) · Red Hat Enterprise Linux Client (v. 7) · Red Hat Enterprise Linux Server Optional (v. 7) · Red Hat Enterprise Linux Workstation (v. 7) · Red Hat Enterprise Linux Desktop (v. 6) · and others 11
fix ↗
Action required by CISAfederal deadline: 2022-06-13

Apply updates per vendor instructions.

In short

A flaw in how Firefox handles JavaScript array operations can cause the browser to crash unexpectedly. Attackers can exploit this to crash your browser, potentially as part of a targeted attack.

Technical detail

Type confusion vulnerability in Array.pop manipulation allowing memory corruption due to improper object handling. Attack vector is JavaScript execution in web content; requires user to visit malicious page. Leads to exploitable crash (DoS or potential code execution).

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop. This can allow for an exploitable crash. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 60.7.1, Firefox < 67.0.3, and Thunderbird < 60.7.2.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Mozilla · FirefoxMozilla · Firefox ESRMozilla · Thunderbird
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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