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Mozilla Foundation Security Advisory 2013-62

Inaccessible updater can lead to local privilege escalation

Announced
June 25, 2013
Reporter
Seb Patane
Impact
High
Products
Firefox
Fixed in
  • Firefox 22

Description

Security researcher Seb Patane reported an issue with the Mozilla Maintenance Service on Windows. He discovered that when the Mozilla Updater executable was inaccessible, the Maintenance Service will behave incorrectly and can be made to use an updater at an arbitrary location. This updater will run with the system privileges used by the Maintenance Service, allowing for local privilege escalation. Local file system access is necessary in order for this issue to be exploitable and it cannot be triggered through web content.

References