In the onQueueFilled function of SoftAVCDec, there is a possible out-of-bounds write due to a use after free if a bad header causes the decoder to get caught in a loop while another thread frees the memory it's accessing. This could lead to a local elevation of privilege enabling code execution as a privileged process with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android. Versions: 6.0, 6.0.1, 7.0, 7.1.1, 7.1.2, 8.0, 8.1. Android ID: A-66969349.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
| Link | Tags |
|---|---|
| https://source.android.com/security/bulletin/2018-01-01 | patch vendor advisory |
| http://www.securitytracker.com/id/1040106 | vdb entry third party advisory |
| http://www.securityfocus.com/bid/102414 | vdb entry third party advisory |