Vulnerability CVE-2014-2735


Published: 2014-04-22

Description:
WinSCP before 5.5.3, when FTP with TLS is used, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
WinSCP 5.5.2.4130 Missing X.509 Validation
Micha Borrmann
17.04.2014

Type:

CWE-20

(Improper Input Validation)

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5.8/10
4.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
None
Affected software
Winscp -> Winscp 

 References:
http://winscp.net/eng/docs/history
http://winscp.net/tracker/show_bug.cgi?id=1152
http://www.securityfocus.com/archive/1/531847/100/0/threaded

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