Use-after-free in workers while using XMLHttpRequest — Mozilla

2015-07-0200:00:00

Mozilla Foundation

www.mozilla.org

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

EPSS

0.045

Percentile

92.5%

JSON

Security researcher Looben Yang used the Address Sanitizer tool to discover two related use-after-free vulnerabilities that occur when using XMLHttpRequest in concert with either shared or dedicated workers. These errors occur when the XMLHttpRequest object is attached to a worker but that object is incorrectly deleted while still in use. This results in exploitable crashes.

Affected configurations

Vulners

Node

mozillafirefoxRange<39

mozillafirefox_esrRange<31.8

mozillafirefox_esrRange<38.1

mozillafirefox_osRange<2.2

mozillaseamonkeyRange<2.35

VendorProductVersionCPE
mozillafirefox*cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozillafirefox_esr*cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
mozillafirefox_os*cpe:2.3:o:mozilla:firefox_os:*:*:*:*:*:*:*:*
mozillaseamonkey*cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
mozilla	firefox	*	cpe:2.3:a:mozilla:firefox::::::::
mozilla	firefox_esr	*	cpe:2.3:a:mozilla:firefox_esr::::::::
mozilla	firefox_os	*	cpe:2.3:o:mozilla:firefox_os::::::::
mozilla	seamonkey	*	cpe:2.3:a:mozilla:seamonkey::::::::