Fortinet FortiOS up to 4.1.10/4.2.12/4.3.8 Cookie Parser memory corruption

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

Summaryinfo

A vulnerability classified as critical has been found in Fortinet FortiOS up to 4.1.10/4.2.12/4.3.8. This vulnerability affects unknown code of the component Cookie Parser. The manipulation leads to memory corruption. This vulnerability is traded as CVE-2016-6909. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Fortinet FortiOS up to 4.1.10/4.2.12/4.3.8 (Firewall Software). This issue affects some unknown processing of the component Cookie Parser. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow in the Cookie parser in Fortinet FortiOS 4.x before 4.1.11, 4.2.x before 4.2.13, and 4.3.x before 4.3.9 and FortiSwitch before 3.4.3 allows remote attackers to execute arbitrary code via a crafted HTTP request, aka EGREGIOUSBLUNDER.

The weakness was shared 08/24/2016 (Website). The advisory is shared at fortiguard.com. The identification of this vulnerability is CVE-2016-6909 since 08/22/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available.

The exploit is available at exploit-db.com. It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 93196 (Fortinet FortiOS Web Interface Cookie Parser RCE (EGREGIOUSBLUNDER)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43499 (FortiGate Cookie Parser Buffer Overflow Vulnerability).

Upgrading to version 4.1.11, 4.2.13 or 4.3.9 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 (40276), Zero-Day.cz (267), Tenable (93196) and SecurityFocus (BID 92523†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Version

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Website

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 93196
Nessus Name: Fortinet FortiOS Web Interface Cookie Parser RCE (EGREGIOUSBLUNDER)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 860196
OpenVAS Name: FortiOS: Cookie Parser Buffer Overflow Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍
Zero-Day.cz: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: FortiOS 4.1.11/4.2.13/4.3.9

Timelineinfo

08/17/2016 🔍
08/17/2016 +0 days 🔍
08/22/2016 +5 days 🔍
08/24/2016 +2 days 🔍
08/24/2016 +0 days 🔍
08/25/2016 +1 days 🔍
08/29/2016 +4 days 🔍
09/24/2024 +2947 days 🔍

Sourcesinfo

Vendor: fortinet.com

Advisory: 138387
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-6909 (🔍)
GCVE (CVE): GCVE-0-2016-6909
GCVE (VulDB): GCVE-100-90929
SecurityFocus: 92523 - Fortinet FortiGate Cookie Parser Buffer Overflow Vulnerability
SecurityTracker: 1036643

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

Entryinfo

Created: 08/25/2016 09:15
Updated: 09/24/2024 01:03
Changes: 08/25/2016 09:15 (63), 04/02/2019 18:29 (16), 09/14/2022 09:48 (4), 07/07/2024 14:42 (22), 09/24/2024 01:03 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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