National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-8819 Detail

Current 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, the replay-cache protection mechanism is ineffective for v2 onion services, aka TROVE-2017-009. An attacker can send many INTRODUCE2 cells to trigger this issue.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (V3 legend)
Impact Score: 3.6
Exploitability Score: 3.9


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

CVSS v2.0 Severity and Metrics:

Base Score: 5.0 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Partial
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516 Vendor Advisory
https://bugs.torproject.org/24244 Vendor Advisory
https://www.debian.org/security/2017/dsa-4054 Third Party Advisory

Technical Details

Vulnerability Type (View All)

  • Improper Access Control (CWE-284)

Known Affected Software Configurations Switch to CPE 2.3

Configuration 1 ( hide )
 cpe:/a:tor_project:tor
     Show Matching CPE(s)
Up to (excluding)
0.2.5.16
 cpe:/a:tor_project:tor
     Show Matching CPE(s)
From (including)
0.2.6
Up to (excluding)
0.2.8.17
 cpe:/a:tor_project:tor
     Show Matching CPE(s)
From (including)
0.2.9
Up to (excluding)
0.2.9.14
 cpe:/a:tor_project:tor
     Show Matching CPE(s)
From (including)
0.3.0
Up to (excluding)
0.3.0.13
 cpe:/a:tor_project:tor
     Show Matching CPE(s)
From (including)
0.3.1
Up to (excluding)
0.3.1.9

Configuration 2 ( hide )
 cpe:/o:debian:debian_linux:8.0
     Show Matching CPE(s)
 cpe:/o:debian:debian_linux:9.0
     Show Matching CPE(s)


Change History

2 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-8819
NVD Published Date:
12/03/2017
NVD Last Modified:
12/21/2017