Fortinet FortiOS 5.4.2 FortiClient SSL_VPN Linux command injection
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.3 | $0-$5k | 0.00 |
A vulnerability was found in Fortinet FortiOS 5.4.2 (Firewall Software) and classified as critical. This issue affects an unknown functionality of the component FortiClient SSL_VPN Linux. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:
A potential execution of unauthorized code or commands vulnerability in Fortinet FortiClient SSL_VPN Linux versions available with FortiOS 5.4.2 and below allows attacker to potentially overwrite an existing file via the FortiClient log file.
The bug was discovered 04/05/2017. The weakness was published 05/27/2017 (Website). It is possible to read the advisory at fortiguard.com. The identification of this vulnerability is CVE-2016-8496 since 10/07/2016. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.
The vulnerability was handled as a non-public zero-day exploit for at least 51 days. During that time the estimated underground price was around $0-$5k.
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
Similar entry is available at 101796.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 5.3VulDB Meta Temp Score: 5.3
VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Command injectionCWE: CWE-77 / CWE-74 / CWE-707
ATT&CK: T1202
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔍
Timeline
10/07/2016 🔍04/05/2017 🔍
04/05/2017 🔍
05/26/2017 🔍
05/27/2017 🔍
05/27/2017 🔍
12/25/2020 🔍
Sources
Vendor: fortinet.comAdvisory: fortiguard.com
Researcher: Grzegorz Wrobel
Status: Not defined
CVE: CVE-2016-8496 (🔍)
SecurityFocus: 98738 - Fortinet FortiClient SSLVPN CVE-2016-8496 Remote Code Execution Vulnerability
OSVDB: - Fortinet FortiClient SSLVPN for Linux file overwrite
See also: 🔍
Entry
Created: 05/27/2017 09:46Updated: 12/25/2020 16:55
Changes: 05/27/2017 09:46 (43), 10/03/2020 12:50 (6), 12/25/2020 16:49 (8), 12/25/2020 16:55 (1)
Complete: 🔍
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