Vulnerability identifier: #VU18824
Vulnerability risk: Critical
CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-843
Exploitation vector: Network
Exploit availability: Yes
Vulnerable software:
Firefox ESR
Client/Desktop applications /
Web browsers
Mozilla Firefox
Client/Desktop applications /
Web browsers
Vendor: Mozilla
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a type confusion error when manipulating JavaScript objects due to issues in Array.pop
. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger a type confusion error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Note: this vulnerability is being actively exploited in the wild along with SB2019062002 (CVE-2019-11708).
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Firefox ESR: 60.0 - 60.7.0
Mozilla Firefox: 61.0 - 67.0.2
External links
http://www.mozilla.org/en-US/security/advisories/mfsa2019-18/
http://twitter.com/5aelo/status/1141273394723414016
http://twitter.com/SecurityGuyPhil/status/1141466335592869888
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.