Vulnerability Details : 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).
Products affected by CVE-2017-11565
- cpe:2.3:a:debian:tor:0.2.9.11-1:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-11565
0.21%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 40 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-11565
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:N |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
3.9
|
3.6
|
NIST |
References for CVE-2017-11565
-
http://www.securityfocus.com/bid/99933
Debian CVE-2017-11565 Security Bypass VulnerabilityThird Party Advisory;VDB Entry
-
https://bugs.debian.org/869153
#869153 - tor: CVE-2017-11565: aa-exec is not longer in /usr/sbin and now apparmor is silently scraped - Debian Bug report logsIssue Tracking;Mailing List;Vendor Advisory
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