Security restrictions bypass in Mozilla Firefox and Firefox ESR

Published: 2019-06-20 19:28:44 | Updated: 2019-06-20
Severity High
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-11708
CVSSv3 7.2 [CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]
CWE ID CWE-264
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software Firefox ESR
Mozilla Firefox
Vulnerable software versions Firefox ESR 60.7.1
Firefox ESR 60.7.0
Firefox ESR 60.6.3

Show more

Mozilla Firefox 67.0.3
Mozilla Firefox 67.0.2
Mozilla Firefox 67.0.1

Show more

Vendor URL Mozilla

Security Advisory

UPDATED: 20.06.2019
Added information about in the wild exploitation of the vulnerability, raised severity risk to High.

1) Permissions, Privileges, and Access Controls

Description

The vulnerability allows a remote attacker to bypass sandbox restrictions.

The vulnerability exists due to insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes. A remote attacker can create a specially crafted web page that can make the non-sandboxed parent process open web content chosen by a compromised child process.

An attacker can combine this behavior along with another vulnerability to execute arbitrary code on the system with privileges on the current user. 

Note, this vulnerability is being exploited in the wild along with SB2019061805 (CVE-2019-11707)

Remediation

Install updates from vendor's website.

External links

https://www.mozilla.org/en-US/security/advisories/mfsa2019-19/
https://twitter.com/5aelo/status/1141273394723414016
https://twitter.com/SecurityGuyPhil/status/1141466335592869888

Back to List