Same-origin policy bypass in Mozilla Firefox - CVE-2018-18494

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Main Vulnerability Database Vulnerabilities #VU16489

Same-origin policy bypass in Mozilla Firefox - CVE-2018-18494

Published: December 12, 2018


Vulnerability identifier: #VU16489
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-18494
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass same-origin policy on the target system.

The weakness exists due to an error .when using the Javascript location property. A remote attacker can trick the victim into visiting a specially crafted website and theft cross-origin URL entries to cause a redirection to another site using performance.getEntries(). 

Affected software

Mozilla Firefox
Firefox ESR
Gentoo Linux
Arch Linux
Debian Linux
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for ARM
Slackware Linux
Opensuse
SUSE Package Hub for SUSE Linux Enterprise
Mozilla Thunderbird
Dell EMC Unity VSA Operating Environment (OE)
Dell EMC Unity Operating Environment (OE)
EMC Cloud Tiering Appliance

How to mitigate CVE-2018-18494

Update to version 64.0.

Mozilla Firefox - update to 64.0
Mozilla Thunderbird - update to 60.4
Firefox ESR - update to 60.4.0
Dell EMC Unity VSA Operating Environment (OE) - update to 5.0.0.0.5.116
Dell EMC Unity Operating Environment (OE) - update to 5.0.0.0.5.116
EMC Cloud Tiering Appliance - update to 12.1.0.65

External References

Related Security Bulletins