CVE-2017-11565: High severity tor (the onion router) vulnerability
debian/tor.init in the Debian tor0.2.9.11-1~deb9u1 package for Tor was designed to execute aa-exec from the standard system pathname if the apparmor package is installed, but implements this incorrectly (with a wrong assumption that the specific pathname would remain the same forever), which allows attackers to bypass intended AppArmor restrictions by leveraging the silent loss of this protection mechanism. NOTE: this does not affect systems, such as default Debian stretch installations, on which Tor startup relies on a systemd unit file (instead of this tor.init script).
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2017-11565?
CVE-2017-11565 has a medium severity rating, as it can lead to execution of unauthorized commands under certain configurations.
How do I fix CVE-2017-11565?
To fix CVE-2017-11565, update to the latest version of the Tor package where the vulnerability has been addressed.
What versions are affected by CVE-2017-11565?
CVE-2017-11565 affects the Debian Tor package version 0.2.9.11-1.
Can CVE-2017-11565 lead to arbitrary command execution?
Yes, CVE-2017-11565 can potentially lead to arbitrary command execution due to improper handling of the aa-exec path.
Is the AppArmor package involved in CVE-2017-11565?
Yes, CVE-2017-11565 is related to the AppArmor package, as the vulnerability arises from the way Tor interacts with it.