CVE-2017-8823

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.

CVSS v3.0 8.1 HIGH
CVSS v2.0 6.8 MEDIUM

8.1^/10

CVSS v3.0 : HIGH

Vector : AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:P

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://bugs.torproject.org/24430	Vendor Advisory
https://bugs.torproject.org/24313	Issue Tracking Vendor Advisory
https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516	Vendor Advisory
https://www.debian.org/security/2017/dsa-4054	Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:tor_project:tor::::::::
	cpe:2.3:a:tor_project:tor::::::::
	cpe:2.3:a:tor_project:tor::::::::
	cpe:2.3:a:tor_project:tor::::::::
	cpe:2.3:a:tor_project:tor::::::::

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:8.0:::::::*
	cpe:2.3:o:debian:debian_linux:9.0:::::::*

Information

Published : 2017-12-02 23:29

Updated : 2017-12-21 10:01

NVD link : CVE-2017-8823

Mitre link : CVE-2017-8823

JSON object : View

CWE

CWE-416

Use After Free

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Products Affected

debian

debian_linux

tor_project

tor

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