National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2007-3149 Detail

Description

sudo, when linked with MIT Kerberos 5 (krb5), does not properly check whether a user can currently authenticate to Kerberos, which allows local users to gain privileges, in a manner unintended by the sudo security model, via certain KRB5_ environment variable settings. NOTE: another researcher disputes this vulnerability, stating that the attacker must be "a user, who can already log into your system, and can already use sudo."

Source:  MITRE      Last Modified:  06/11/2007

Quick Info

CVE Dictionary Entry:
CVE-2007-3149
Original release date:
06/11/2007
Last revised:
09/05/2008
Source:
US-CERT/NIST

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score:
7.2 HIGH
Vector:
(AV:L/AC:L/Au:N/C:C/I:C/A:C) (legend)
Impact Subscore:
10.0
Exploitability Subscore:
3.9
CVSS Version 2 Metrics:
Access Vector:
Locally exploitable
Access Complexity:
Low
Authentication:
Not required to exploit
Impact Type:
Provides administrator access, Allows complete confidentiality, integrity, and availability violation; Allows unauthorized disclosure of information; Allows disruption of service

Vendor Statements (disclaimer)

Official Statement from Red Hat (06/11/2007)

Not vulnerable. Versions of sudo package shipped with Red Hat Enterprise Linux versions 2.1, 3, 4 and 5 are linked with PAM support and never use libkrb5 authentication.

References to Advisories, Solutions, and Tools

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Hyperlink Resource Type Source Name
http://www.securityfocus.com/archive/1/archive/1/470739/100/0/threaded External Source BUGTRAQ 20070607 Sudo: local root compromise with krb5 enabled
http://www.securityfocus.com/archive/1/archive/1/470752/100/0/threaded External Source BUGTRAQ 20070607 MIT krb5: makes sudo authentication issue MUCH worse.
http://www.securityfocus.com/archive/1/archive/1/470774/100/0/threaded External Source BUGTRAQ 20070607 Re: Sudo: local root compromise with krb5 enabled
http://www.securityfocus.com/bid/24368 External Source BID 24368
http://www.sudo.ws/cgi-bin/cvsweb/sudo/auth/kerb5.c External Source CONFIRM http://www.sudo.ws/cgi-bin/cvsweb/sudo/auth/kerb5.c

Technical Details

Vulnerability Type (View All)

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