Citrix Netscaler Application Delivery Controller up to 10.5/11.1/12.0 TLS Bleichenbacher information disclosure
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.5 | $0-$5k | 0.00 |
A vulnerability was found in Citrix Netscaler Application Delivery Controller and Netscaler Gateway up to 10.5/11.1/12.0 (Network Management Software). It has been declared as problematic. This vulnerability affects some unknown processing of the component TLS. The manipulation with an unknown input leads to a information disclosure vulnerability (Bleichenbacher). The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:
Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway 10.5 before build 67.13, 11.0 before build 71.22, 11.1 before build 56.19, and 12.0 before build 53.22 might allow remote attackers to decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, aka a ROBOT attack.
The bug was discovered 12/12/2017. The weakness was disclosed 12/13/2017 by Juraj Somorovsky with Tripwire VERT as confirmed advisory (CERT.org). The advisory is available at kb.cert.org. This vulnerability was named CVE-2017-17382 since 12/04/2017. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.
The vulnerability scanner Nessus provides a plugin with the ID 105373 (Citrix NetScaler Multiple Vulnerabilities (CTX230238, CTX230612)), 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 38695 (TLS ROBOT Vulnerability Detected).
Applying a patch is able to eliminate this problem. A possible mitigation has been published even before and not after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (105373). The entries 97507, 110567, 110568 and 110663 are pretty similar.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
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CVSSv3
VulDB Meta Base Score: 5.7VulDB Meta Temp Score: 5.6
VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 5.9
NVD Vector: 🔍
CVSSv2
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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VulDB Base Score: 🔍
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Exploiting
Name: BleichenbacherClass: Information disclosure / Bleichenbacher
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍
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: 105373
Nessus Name: Citrix NetScaler Multiple Vulnerabilities (CTX230238, CTX230612)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
0-Day Time: 🔍
Timeline
12/04/2017 🔍12/12/2017 🔍
12/12/2017 🔍
12/12/2017 🔍
12/13/2017 🔍
12/13/2017 🔍
12/14/2017 🔍
12/19/2017 🔍
01/27/2021 🔍
Sources
Vendor: citrix.comAdvisory: kb.cert.org
Researcher: Juraj Somorovsky
Organization: Tripwire VERT
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2017-17382 (🔍)
SecurityTracker: 1039985
SecurityFocus: 102173 - Multiple Citrix Products CVE-2017-17382 Information Disclosure Vulnerability
See also: 🔍
Entry
Created: 12/14/2017 07:53Updated: 01/27/2021 11:29
Changes: 12/14/2017 07:53 (73), 12/15/2019 08:27 (6), 01/27/2021 11:29 (3)
Complete: 🔍
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