Use-after-free in HTML5 string parser
- March 8, 2016
- Firefox, Firefox ESR, Thunderbird
- Fixed in
- Firefox 45
- Firefox ESR 38.7
- Thunderbird 38.7
- Thunderbird 45
Security researcher ca0nguyen, working with HP's Zero Day Initiative, reported a use-after-free issue in the HTML5 string parser when parsing a particular set of table-related tags in a foreign fragment context such as SVG. This results in a potentially exploitable crash.
In general this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled, but is potentially a risk in browser or browser-like contexts.