WinSCP 5.5/5.5.1/5.5.2 X.509 Certificate CN input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in WinSCP 5.5/5.5.1/5.5.2. Impacted is an unknown function of the component X.509 Certificate Handler. The manipulation of the argument CN leads to input validation. This vulnerability is documented as CVE-2014-2735. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in WinSCP 5.5/5.5.1/5.5.2 (Connectivity Software) and classified as problematic. This issue affects some unknown processing of the component X.509 Certificate Handler. The manipulation of the argument CN with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is integrity.

The weakness was released 04/16/2014 by Micha Borrmann with SYSS as confirmed posting (Bugtraq). The advisory is shared at securityfocus.com. The identification of this vulnerability is CVE-2014-2735 since 04/08/2014. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 73613 (WinSCP Heartbeat Information Disclosure (Heartbleed)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows. The commercial vulnerability scanner Qualys is able to test this issue with plugin 122577 (WinSCP OpenSSL Multiple Vulnerabilities).

Upgrading to version 5.5.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (93829), Tenable (73613), SecurityFocus (BID 66936†) and Vulnerability Center (SBV-44224†). Entries connected to this vulnerability are available at VDB-67297, VDB-67298, VDB-67299 and VDB-67300. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 73613
Nessus Name: WinSCP Heartbeat Information Disclosure (Heartbleed)
Nessus File: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: WinSCP 5.5.3

Timelineinfo

04/08/2014 🔍
04/10/2014 +2 days 🔍
04/10/2014 +0 days 🔍
04/16/2014 +6 days 🔍
04/22/2014 +6 days 🔍
04/24/2014 +2 days 🔍
03/12/2015 +322 days 🔍
05/26/2017 +806 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Researcher: Micha Borrmann
Organization: SYSS
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-2735 (🔍)
GCVE (CVE): GCVE-0-2014-2735
GCVE (VulDB): GCVE-100-34061
X-Force: 93829 - WinSCP X.509 spoofing, Medium Risk
SecurityFocus: 66936 - WinSCP X.509 Certificate Validation Security Bypass Vulnerability
Vulnerability Center: 44224 - WinSCP before 5.5.3 Remote Man-in-the-Middle and SSL Spoofing when FTP with TLS is Used, Medium

See also: 🔍

Entryinfo

Created: 03/12/2015 22:21
Updated: 05/26/2017 03:42
Changes: 03/12/2015 22:21 (69), 05/26/2017 03:42 (5)
Complete: 🔍
Cache ID: 216:A6D:103

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