Fortinet FortiOS up to 5.0.7 SSH Server Password access control

CVSS Meta Temp Score
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Fortinet FortiOS up to 5.0.7. It has been declared as critical. The impacted element is an unknown function of the component SSH Server. Executing a manipulation of the argument Password can lead to access control. This vulnerability is handled as CVE-2016-1909. The attack can be executed remotely. Additionally, an exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Fortinet FortiOS up to 5.0.7 (Firewall Software). It has been declared as very critical. This vulnerability affects some unknown processing of the component SSH Server. The manipulation of the argument Password with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

FortiOS 4.x before 4.3.17 and 5.0.x before 5.0.8 has a hardcoded passphrase for the Fortimanager_Access account, which allows remote attackers to obtain administrative access via an SSH session.

The weakness was released 01/15/2016 as not defined exploit (Exploit-DB). The advisory is shared for download at exploit-db.com. This vulnerability was named CVE-2016-1909 since 01/15/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/01/2024). The MITRE ATT&CK project declares the attack technique as T1068.

After immediately, there has been an exploit disclosed. It is possible to download the exploit at exploit-db.com. It is declared as highly functional. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 87896 (Fortinet FortiOS SSH Undocumented Interactive Login Vulnerability), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38633 (FortiOS Fortimanager_Access SSH Interactive Login Vulnerability). The code used by the exploit is:

m.update('\x00' * 12)
m.update(n + 'FGTAbc11*xy+Qqz27')
m.update('\xA3\x88\xBA\x2E\x42\x4C\xB0\x4A\x53\x79\x30\xC1\x31\x07\xCC\x3F\xA1\x32\x90\x29\xA9\x81\x5B\x70')

Upgrading to version 4.3.17 or 5.0.8 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (39224), Tenable (87896) and SecurityFocus (BID 80581†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 87896
Nessus Name: Fortinet FortiOS SSH Undocumented Interactive Login Vulnerability
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 103433
OpenVAS Name: FortiOS: SSH Undocumented Interactive Login Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Saint ID: exploit_info/fortigate_ssh_backdoor
Saint Name: FortiOS Fortimanager_Access SSH account backdoor

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: fortinet_backdoor.rb
MetaSploit Name: Fortinet SSH Backdoor Scanner
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: FortiOS 4.3.17/5.0.8

Timelineinfo

07/09/2014 🔍
01/12/2016 +553 days 🔍
01/15/2016 +2 days 🔍
01/15/2016 +0 days 🔍
01/15/2016 +0 days 🔍
01/15/2016 +0 days 🔍
01/17/2016 +2 days 🔍
09/01/2024 +3150 days 🔍

Sourcesinfo

Vendor: fortinet.com

Advisory: 135225
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-1909 (🔍)
GCVE (CVE): GCVE-0-2016-1909
GCVE (VulDB): GCVE-100-80296
SecurityFocus: 80581
SecurityTracker: 1034663

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/17/2016 13:09
Updated: 09/01/2024 19:55
Changes: 01/17/2016 13:09 (64), 09/23/2018 08:48 (27), 07/03/2022 14:33 (5), 09/01/2024 19:55 (14)
Complete: 🔍
Cache ID: 216:488:103

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