Accellion FTP Server prior FTA_9_12_220 Error Message Username information disclosure

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Accellion FTP Server. This issue affects some unknown processing of the component Error Message Handler. Such manipulation leads to information disclosure (Username). This vulnerability is documented as CVE-2016-9499. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Accellion FTP Server (File Transfer Software). Affected by this issue is some unknown functionality of the component Error Message Handler. The manipulation with an unknown input leads to a information disclosure vulnerability (Username). Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

Accellion FTP server prior to version FTA_9_12_220 only returns the username in the server response if the username is invalid. An attacker may use this information to determine valid user accounts and enumerate them.

The bug was discovered 02/08/2017. The weakness was released 07/13/2018 by Ashish Kamble as confirmed advisory (CERT.org). The advisory is available at kb.cert.org. This vulnerability is handled as CVE-2016-9499 since 11/21/2016. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 520 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version FTA_9_12_220 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 96154†). Entry connected to this vulnerability is available at VDB-121467. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: Username
Class: Information disclosure / Username
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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OpenVAS ID: 100942
OpenVAS Name: Accellion FTA Multiple Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: FTP Server FTA_9_12_220

Timelineinfo

11/21/2016 🔍
02/08/2017 +79 days 🔍
02/08/2017 +0 days 🔍
07/13/2018 +519 days 🔍
07/13/2018 +0 days 🔍
07/14/2018 +1 days 🔍
12/27/2024 +2358 days 🔍

Sourcesinfo

Advisory: kb.cert.org
Researcher: Ashish Kamble
Status: Confirmed

CVE: CVE-2016-9499 (🔍)
GCVE (CVE): GCVE-0-2016-9499
GCVE (VulDB): GCVE-100-121466
CERT: 🔍
SecurityFocus: 96154 - Accellion FTP server Information Disclosure and Cross-Site Scripting Vulnerabilities

See also: 🔍

Entryinfo

Created: 07/14/2018 17:08
Updated: 12/27/2024 13:35
Changes: 07/14/2018 17:08 (71), 03/05/2020 08:37 (1), 12/27/2024 13:35 (17)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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