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Vulnerability Details : CVE-2007-2243

OpenSSH 4.6 and earlier, when ChallengeResponseAuthentication is enabled, allows remote attackers to determine the existence of user accounts by attempting to authenticate via S/KEY, which displays a different response if the user account exists, a similar issue to CVE-2001-1483.
Publish Date : 2007-04-25 Last Update Date : 2008-09-05
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 287

- Vendor Statements

Not vulnerable. OpenSSH supplied with Red Hat Enterprise Linux 2.1, 3, 4, and 5 does not contain S/KEY support.
Source: Redhat

- Products Affected By CVE-2007-2243

# Product Type Vendor Product Version Update Edition Language
1 Application Openbsd Openssh 1.2 Version Details Vulnerabilities
2 Application Openbsd Openssh 1.2.1 Version Details Vulnerabilities
3 Application Openbsd Openssh 1.2.2 Version Details Vulnerabilities
4 Application Openbsd Openssh 1.2.3 Version Details Vulnerabilities
5 Application Openbsd Openssh 1.2.27 Version Details Vulnerabilities
6 Application Openbsd Openssh 2.1 Version Details Vulnerabilities
7 Application Openbsd Openssh 2.1.1 Version Details Vulnerabilities
8 Application Openbsd Openssh 2.2 Version Details Vulnerabilities
9 Application Openbsd Openssh 2.3 Version Details Vulnerabilities
10 Application Openbsd Openssh 2.5 Version Details Vulnerabilities
11 Application Openbsd Openssh 2.5.1 Version Details Vulnerabilities
12 Application Openbsd Openssh 2.5.2 Version Details Vulnerabilities
13 Application Openbsd Openssh 2.9p1 Version Details Vulnerabilities
14 Application Openbsd Openssh 2.9p2 Version Details Vulnerabilities
15 Application Openbsd Openssh 2.9 Version Details Vulnerabilities
16 Application Openbsd Openssh 2.9.9 Version Details Vulnerabilities
17 Application Openbsd Openssh 2.9.9p2 Version Details Vulnerabilities
18 Application Openbsd Openssh 3.0p1 Version Details Vulnerabilities
19 Application Openbsd Openssh 3.0 Version Details Vulnerabilities
20 Application Openbsd Openssh 3.0.1 Version Details Vulnerabilities
21 Application Openbsd Openssh 3.0.1p1 Version Details Vulnerabilities
22 Application Openbsd Openssh 3.0.2 Version Details Vulnerabilities
23 Application Openbsd Openssh 3.0.2p1 Version Details Vulnerabilities
24 Application Openbsd Openssh 3.1 Version Details Vulnerabilities
25 Application Openbsd Openssh 3.1p1 Version Details Vulnerabilities
26 Application Openbsd Openssh 3.2 Version Details Vulnerabilities
27 Application Openbsd Openssh 3.2.2 Version Details Vulnerabilities
28 Application Openbsd Openssh 3.2.2p1 Version Details Vulnerabilities
29 Application Openbsd Openssh 3.2.3p1 Version Details Vulnerabilities
30 Application Openbsd Openssh 3.3 Version Details Vulnerabilities
31 Application Openbsd Openssh 3.3p1 Version Details Vulnerabilities
32 Application Openbsd Openssh 3.4 Version Details Vulnerabilities
33 Application Openbsd Openssh 3.4p1 Version Details Vulnerabilities
34 Application Openbsd Openssh 3.5p1 Version Details Vulnerabilities
35 Application Openbsd Openssh 3.5 Version Details Vulnerabilities
36 Application Openbsd Openssh 3.6 Version Details Vulnerabilities
37 Application Openbsd Openssh 3.6.1 Version Details Vulnerabilities
38 Application Openbsd Openssh 3.6.1p1 Version Details Vulnerabilities
39 Application Openbsd Openssh 3.6.1p2 Version Details Vulnerabilities
40 Application Openbsd Openssh 3.7 Version Details Vulnerabilities
41 Application Openbsd Openssh 3.7.1 Version Details Vulnerabilities
42 Application Openbsd Openssh 3.7.1p1 Version Details Vulnerabilities
43 Application Openbsd Openssh 3.7.1p2 Version Details Vulnerabilities
44 Application Openbsd Openssh 3.8 Version Details Vulnerabilities
45 Application Openbsd Openssh 3.8.1p1 Version Details Vulnerabilities
46 Application Openbsd Openssh 3.8.1 Version Details Vulnerabilities
47 Application Openbsd Openssh 3.9 Version Details Vulnerabilities
48 Application Openbsd Openssh 3.9.1 Version Details Vulnerabilities
49 Application Openbsd Openssh 3.9.1p1 Version Details Vulnerabilities
50 Application Openbsd Openssh 4.0p1 Version Details Vulnerabilities
51 Application Openbsd Openssh 4.0 Version Details Vulnerabilities
52 Application Openbsd Openssh 4.1 Version Details Vulnerabilities
53 Application Openbsd Openssh 4.1p1 Version Details Vulnerabilities
54 Application Openbsd Openssh 4.2 Version Details Vulnerabilities
55 Application Openbsd Openssh 4.2p1 Version Details Vulnerabilities
56 Application Openbsd Openssh 4.3 Version Details Vulnerabilities
57 Application Openbsd Openssh 4.3p1 Version Details Vulnerabilities
58 Application Openbsd Openssh 4.3p2 Version Details Vulnerabilities
59 Application Openbsd Openssh 4.4 Version Details Vulnerabilities
60 Application Openbsd Openssh 4.4p1 Version Details Vulnerabilities
61 Application Openbsd Openssh 4.5 Version Details Vulnerabilities
62 Application Openbsd Openssh 4.6 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Openbsd Openssh 62

- References For CVE-2007-2243

http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/053906.html
FULLDISC 20070421 OpenSSH - System Account Enumeration if S/Key is used
http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/053951.html
FULLDISC 20070424 OpenSSH - System Account Enumeration if S/Key is used
http://www.osvdb.org/34600
OSVDB 34600
http://securityreason.com/securityalert/2631
SREASON 2631
http://xforce.iss.net/xforce/xfdb/33794
XF openssh-challenge-information-disclosure(33794)
http://www.securityfocus.com/bid/23601
BID 23601 OpenSSH S/Key Remote Information Disclosure Vulnerability Release Date:2007-04-23

- Metasploit Modules Related To CVE-2007-2243

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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