Citrix Netscaler VPX up to NS12.0 53.13.nc /rapi/read_url server-side request forgery
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
7.2 | $0-$5k | 0.00 |
A vulnerability was found in Citrix Netscaler VPX up to NS12.0 53.13.nc (Network Management Software) and classified as critical. Affected by this issue is some unknown functionality of the file /rapi/read_url. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. CVE summarizes:
Citrix NetScaler VPX through NS12.0 53.13.nc allows an SSRF attack via the /rapi/read_url URI by an authenticated attacker who has a webapp account. The attacker can gain access to the nsroot account, and execute remote commands with root privileges.
The bug was discovered 01/24/2018. The weakness was published 02/01/2018 (Website). The advisory is available at securityfocus.com. This vulnerability is handled as CVE-2018-6186 since 01/24/2018. The exploitation is known to be easy. The attack may be launched remotely. A simple authentication is required for exploitation. Technical details are known, but there is no available exploit.
The vulnerability was handled as a non-public zero-day exploit for at least 8 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 110903 (Citrix NetScaler Multiple Vulnerabilities (CTX232161)), 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 c. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370797 (Citrix NetScaler ADC and Gateway Multiple Security Updates (CTX232161)).
Upgrading eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (110903). Similar entries are available at 114133, 114134, 114135 and 114136.
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: 7.5VulDB Meta Temp Score: 7.4
VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 8.8
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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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: Server-side request forgeryCWE: CWE-918
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Nessus ID: 110903
Nessus Name: Citrix NetScaler Multiple Vulnerabilities (CTX232161)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Timeline
01/24/2018 🔍01/24/2018 🔍
02/01/2018 🔍
02/01/2018 🔍
02/01/2018 🔍
02/02/2018 🔍
03/01/2018 🔍
07/05/2018 🔍
02/02/2021 🔍
Sources
Vendor: citrix.comAdvisory: securityfocus.com⛔
Researcher: buxu
Status: Not defined
Confirmation: 🔍
CVE: CVE-2018-6186 (🔍)
SecurityTracker: 1040440
SecurityFocus: 102915 - Citrix NetScaler VPX CVE-2018-6186 Privilege Escalation Vulnerability
See also: 🔍
Entry
Created: 02/02/2018 07:52Updated: 02/02/2021 14:01
Changes: 02/02/2018 07:52 (67), 01/01/2020 07:15 (10), 02/02/2021 13:55 (2), 02/02/2021 14:01 (1)
Complete: 🔍
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