DOMParser loads linked resources in extensions when parsing text/html

DOMParser loads linked resources in extensions when parsing text/html

Announced

August 28, 2012

Reporter

vsemozhetbyt

Impact

Moderate

Products

Firefox, SeaMonkey, Thunderbird

Fixed in

• Firefox 15
• SeaMonkey 2.12
• Thunderbird 15

Description

Security researcher vsemozhetbyt reported that when the DOMParser is used to parse text/html data in a Firefox extension, linked resources within this HTML data will be loaded. If the data being parsed in the extension is untrusted, it could lead to information leakage and can potentially be combined with other attacks to become exploitable.

References

• DOMParser does subresource loads when used from privileged code
• CVE-2012-3975