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National Cyber Awareness System

Vulnerability Summary for CVE-2011-1956

Original release date:06/06/2011
Last revised:08/14/2012
Source: US-CERT/NIST

Overview

The bytes_repr_len function in Wireshark 1.4.5 uses an incorrect pointer argument, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via arbitrary TCP traffic.

Description

Per: http://cwe.mitre.org/data/definitions/476.html 'CWE-476: NULL Pointer Dereference'

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score:4.3 (MEDIUM) (AV:N/AC:M/Au:N/C:N/I:N/A:P) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable; Victim must voluntarily interact with attack mechanism
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown

References to Advisories, Solutions, and Tools

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External Source: CONFIRM
Name: http://www.wireshark.org/news/20110418.html
Type: Patch Information
Hyperlink:http://www.wireshark.org/news/20110418.html
External Source: CONFIRM
Name: http://www.wireshark.org/docs/relnotes/wireshark-1.4.6.html
Type: Patch Information
Hyperlink:http://www.wireshark.org/docs/relnotes/wireshark-1.4.6.html
External Source: CONFIRM
Name: https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5837
Hyperlink:https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5837
External Source: XF
Name: wireshark-desegmenttcp-dos(67789)
Hyperlink:http://xforce.iss.net/xforce/xfdb/67789
External Source: SECUNIA
Name: 44449
Hyperlink:http://secunia.com/advisories/44449
External Source: OVAL
Name: oval:org.mitre.oval:def:14943
Hyperlink:http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:14943
External Source: MLIST
Name: [oss-security] 20110601 Re: CVE request for Wireshark 1.4.5 TCP DoS issue
Hyperlink:http://openwall.com/lists/oss-security/2011/06/01/9
External Source: MLIST
Name: [oss-security] 20110531 CVE request for Wireshark 1.4.5 TCP DoS issue
Hyperlink:http://openwall.com/lists/oss-security/2011/05/31/19

Vulnerable software and versions

Nav control imageConfiguration 1
spacerNav control imageOR
spacerspacerNav control image* cpe:/a:wireshark:wireshark:1.4.5
* 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-2011-1956