CVE-2017-17715

Name of the Vulnerable Software and Affected Versions Telegram Messenger for Android versions prior to 2017-12-08

Description The issue concerns the saveFile method in MediaController.java, which allows directory traversal. This can be achieved via a pathname obtained in a file-transfer request from a remote peer. For example, it can be used to write to files such as tgnet.dat or tgnet.dat.bak.

Recommendations For versions prior to 2017-12-08, update to a version released after 2017-12-08 to resolve the issue. As a temporary workaround, consider restricting file-transfer requests from remote peers to minimize the risk of exploitation.