VDB-104418 · CVE-2017-11565 · BID 99933

Tor tor_0.2.9.11-1~deb9u1 on Debian AppArmor debian/tor.init access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.1$0-$5k0.00

A vulnerability classified as critical has been found in Tor tor_0.2.9.11-1~deb9u1 on Debian (Network Encryption Software). Affected is some unknown processing of the file debian/tor.init of the component AppArmor. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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).

The bug was discovered 07/21/2017. The weakness was presented 07/23/2017 (Website). The advisory is available at bugs.debian.org. This vulnerability is traded as CVE-2017-11565 since 07/23/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 01/06/2021). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $25k-$100k.

Upgrading eliminates this vulnerability.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/21/2017 🔍
07/23/2017 +2 days 🔍
07/23/2017 +0 days 🔍
07/23/2017 +0 days 🔍
07/23/2017 +0 days 🔍
07/24/2017 +1 days 🔍
01/06/2021 +1262 days 🔍

Sourcesinfo

Advisory: bugs.debian.org
Researcher: Luciano Bello.
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-11565 (🔍)
SecurityFocus: 99933 - Debian CVE-2017-11565 Security Bypass Vulnerability

Entryinfo

Created: 07/24/2017 12:16
Updated: 01/06/2021 11:47
Changes: 07/24/2017 12:16 (61), 10/31/2019 16:50 (4), 01/06/2021 11:47 (2)
Complete: 🔍

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