|Date: (C)2008-11-13 (M)2017-10-04|
|CVSS Score: 10.0||Access Vector: NETWORK|
|Exploitability Subscore: 10.0||Access Complexity: LOW|
|Impact Subscore: 10.0||Authentication: NONE|
| ||Confidentiality: COMPLETE|
| ||Integrity: COMPLETE|
| ||Availability: COMPLETE|
jslock.cpp in Mozilla Firefox 3.x before 3.0.2, Firefox 2.x before 18.104.22.168, Thunderbird 2.x before 22.214.171.124, and SeaMonkey 1.x before 1.1.13 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by modifying the window.__proto__.__proto__ object in a way that causes a lock on a non-native object, which triggers an assertion failure related to the OBJ_IS_NATIVE function.