CVE-2017-11565

Name: CVE-2017-11565
Creator: NVD / NIST
Published: 2017-07-23T20:29:00.173+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.15%

Last modified Jun 17, 2026

CVE-2017-11565 is a vulnerability of currently unknown severity. 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 estimates a 1.15% chance of exploitation in the next 30 days.

Description

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).

Metrics

EPSS Probability

1.15%

62.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Debian	Tor	0.2.9.11-1

References

http://www.securityfocus.com/bid/99933Third Party Advisory, VDB Entry
https://bugs.debian.org/869153Issue Tracking, Mailing List, Vendor Advisory
http://www.securityfocus.com/bid/99933Third Party Advisory, VDB Entry
https://bugs.debian.org/869153Issue Tracking, Mailing List, Vendor Advisory

Timeline

Published: Jul 23, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-11565?

How severe is CVE-2017-11565?

Severity scoring for CVE-2017-11565 is pending analysis. The EPSS model estimates a 1.15% probability of exploitation in the next 30 days.

How do I fix CVE-2017-11565?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-11565?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST