Citrix Netscaler SD-WAN up to 9.1.2.26.561201 Session ID Cookie input validation

CVSS Meta Temp Score
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CTI Interest Score
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9.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Citrix Netscaler SD-WAN up to 9.1.2.26.561201. It has been classified as critical. The affected element is an unknown function of the component Session ID Cookie. Performing a manipulation results in input validation. This vulnerability is cataloged as CVE-2017-6316. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as very critical has been found in Citrix Netscaler SD-WAN up to 9.1.2.26.561201 (Network Management Software). This affects an unknown code block of the component Session ID Cookie. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Citrix NetScaler SD-WAN devices through v9.1.2.26.561201 allow remote attackers to execute arbitrary shell commands as root via a CGISESSID cookie. On CloudBridge (the former name of NetScaler SD-WAN) devices, the cookie name was CAKEPHP rather than CGISESSID.

The bug was discovered 07/19/2017. The weakness was shared 07/20/2017 as EDB-ID 42345 as confirmed exploit (Exploit-DB). It is possible to read the advisory at exploit-db.com. This vulnerability is uniquely identified as CVE-2017-6316 since 02/24/2017. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/05/2025).

After immediately, there has been an exploit disclosed. The exploit is shared for download at exploit-db.com. It is declared as attacked. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 121386 (Citrix SD-WAN Cookie Command Injection), 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 11850 (Citrix NetScaler SD-WAN and CloudBridge Virtual WAN Management Interface Remote Code Execution Vulnerability). The CISA Known Exploited Vulnerabilities Catalog lists this issue since 03/25/2022 with a due date of 04/15/2022:

Apply updates per vendor instructions.

Upgrading eliminates this vulnerability. A possible mitigation has been published 5 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (42345), Tenable (121386), SecurityFocus (BID 99943†) and SecurityTracker (ID 1039019†). Be aware that VulDB is the high quality source for vulnerability data.

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: 9.7

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

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 9.8
CNA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

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

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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 121386
Nessus Name: Citrix SD-WAN Cookie Command Injection
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

D2Sec: Citrix NetScaler SD-WAN RCE

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Exploit Delay Time: 🔍

Timelineinfo

02/24/2017 🔍
07/19/2017 +145 days 🔍
07/20/2017 +1 days 🔍
07/20/2017 +0 days 🔍
07/20/2017 +0 days 🔍
07/20/2017 +0 days 🔍
07/20/2017 +0 days 🔍
07/25/2017 +5 days 🔍
07/25/2017 +0 days 🔍
07/28/2017 +3 days 🔍
01/25/2019 +546 days 🔍
02/05/2025 +2203 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: EDB-ID 42345
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-6316 (🔍)
GCVE (CVE): GCVE-0-2017-6316
GCVE (VulDB): GCVE-100-104319
SecurityFocus: 99943 - Multiple Citrix Products CVE-2017-6316 Remote Code Execution Vulnerability
SecurityTracker: 1039019

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

Entryinfo

Created: 07/20/2017 20:08
Updated: 02/05/2025 01:01
Changes: 07/20/2017 20:08 (81), 12/31/2019 09:27 (9), 04/24/2024 10:59 (25), 07/17/2024 02:26 (1), 09/09/2024 22:29 (1), 02/05/2025 01:01 (10)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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