What is CVE-2017-11565?

CVE-2017-11565 is a high-severity vulnerability in Debian Tor. CVSS score: 7.5/10. Published 2017-07-23.

How severe is CVE-2017-11565?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Debian Tor

CVE-2017-11565

debian/tor.init in the Debian tor_0.2.9.11-1~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).

EPSS: 0.012 (63.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Debian Tor — versions 0.2.9.11-1
N/a — versions n/a

References

cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
cve@mitre.org (x_refsource_CONFIRM, Mailing List, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2017-11565?: CVE-2017-11565 is a high-severity vulnerability in Debian Tor. CVSS score: 7.5/10. Published 2017-07-23.
How severe is CVE-2017-11565?: High severity. CVSS v3 base score is 7.5 out of 10.