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National Cyber Awareness System

Vulnerability Summary for CVE-2012-3518

Original release date:08/26/2012
Last revised:04/11/2013
Source: US-CERT/NIST

Overview

The networkstatus_parse_vote_from_string function in routerparse.c in Tor before 0.2.2.38 does not properly handle an invalid flavor name, which allows remote attackers to cause a denial of service (out-of-bounds read and daemon crash) via a crafted (1) vote document or (2) consensus document.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score:5.0 (MEDIUM) (AV:N/AC:L/Au:N/C:N/I:N/A:P) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown

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External Source: CONFIRM
Name: https://trac.torproject.org/projects/tor/ticket/6530
Hyperlink:https://trac.torproject.org/projects/tor/ticket/6530
External Source: MLIST
Name: [tor-announce] 20120819 Tor 0.2.2.38 is released
Hyperlink:https://lists.torproject.org/pipermail/tor-announce/2012-August/000086.html
External Source: CONFIRM
Name: https://gitweb.torproject.org/tor.git/commit/57e35ad3d91724882c345ac709666a551a977f0f
Hyperlink:https://gitweb.torproject.org/tor.git/commit/57e35ad3d91724882c345ac709666a551a977f0f
External Source: CONFIRM
Name: https://gitweb.torproject.org/tor.git/commit/55f635745afacefffdaafc72cc176ca7ab817546
Hyperlink:https://gitweb.torproject.org/tor.git/commit/55f635745afacefffdaafc72cc176ca7ab817546
External Source: SECUNIA
Name: 50583
Hyperlink:http://secunia.com/advisories/50583
External Source: MLIST
Name: [oss-security] 20120821 Re: CVE Request -- Tor 0.2.2.38: Three issues
Hyperlink:http://openwall.com/lists/oss-security/2012/08/21/6
External Source: SUSE
Name: openSUSE-SU-2012:1068
Hyperlink:http://lists.opensuse.org/opensuse-updates/2012-08/msg00048.html

Vulnerable software and versions

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spacerspacerNav control image* cpe:/a:tor:tor:0.2.2.37 and previous versions
* Denotes Vulnerable Software
* Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)
CVE Standard Vulnerability Entry:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3518