| Description: | Not optimal regular expression in the filter could be exploited to create extra server load or make particular page unavailable |
| Issue summary: | ReDOS in the multimedia filter |
| Severity/Risk: | Serious |
| Versions affected: | 2.8 to 2.8.1, 2.7 to 2.7.3, 2.6 to 2.6.6 and earlier unsupported versions |
| Versions fixed: | 2.8.2, 2.7.4 and 2.6.7 |
| Reported by: | Nicolas Martignoni |
| Issue no.: | MDL-48546 |
| Workaround: | Disable multimedia filter |
| CVE identifier: | CVE-2015-0217 |
| Changes (master): | http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-48546 |