CVE-2017-8823

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

03/12/2017

Last modified:

20/04/2025

Description

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, there is a use-after-free in onion service v2 during intro-point expiration because the expiring list is mismanaged in certain error cases, aka TROVE-2017-013.

Impact

Vector 3.x

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.10 HIGH
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

8.10

Severity 3.x

HIGH

Vector 2.0

AV:N/AC:M/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 6.80 MEDIUM
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0

6.80

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:tor_project:tor::::::::		0.2.5.16 (excluding)
cpe:2.3:a:tor_project:tor::::::::	0.2.6 (including)	0.2.8.17 (excluding)
cpe:2.3:a:tor_project:tor::::::::	0.2.9 (including)	0.2.9.14 (excluding)
cpe:2.3:a:tor_project:tor::::::::	0.3.0 (including)	0.3.0.13 (excluding)
cpe:2.3:a:tor_project:tor::::::::	0.3.1 (including)	0.3.1.9 (excluding)
cpe:2.3:o:debian:debian_linux:8.0:::::::*
cpe:2.3:o:debian:debian_linux:9.0:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2017-8823

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools