CVE-2019-11691

HIGH

Description

A use-after-free vulnerability can occur when working with XMLHttpRequest (XHR) in an event loop, causing the XHR main thread to be called after it has been freed. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1542465

https://www.mozilla.org/security/advisories/mfsa2019-13/

https://www.mozilla.org/security/advisories/mfsa2019-14/

https://www.mozilla.org/security/advisories/mfsa2019-15/

Details

Source: MITRE

Published: 2019-07-23

Updated: 2019-07-26

Type: CWE-416

Risk Information

CVSS v2.0

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3.0

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL