CyberArk Password Vault Web Access up to 9.9.4 REST API HTTP Header deserialization

CVSS Meta Temp Score
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CTI Interest Score
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8.2$0-$5k0.00

A vulnerability classified as critical was found in CyberArk Password Vault Web Access up to 9.9.4. This vulnerability affects an unknown code of the component REST API. The manipulation as part of a HTTP Header leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The REST API in CyberArk Password Vault Web Access before 9.9.5 and 10.x before 10.1 allows remote attackers to execute arbitrary code via a serialized .NET object in an Authorization HTTP header.

The bug was discovered 04/09/2018. The weakness was presented 04/12/2018 as not defined posting (Bugtraq). The advisory is available at securityfocus.com. This vulnerability was named CVE-2018-9843 since 04/07/2018. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 110287 (CyberArk Password Vault Web Access .NET Object Deserialization (Direct Check)), 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 370901 (CyberArk Password Vault Web Access remote code execution vulnerability).

Upgrading to version 9.9.5 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (110287) and Exploit-DB (44429).

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.2

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 110287
Nessus Name: CyberArk Password Vault Web Access .NET Object Deserialization (Direct Check)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
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Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Password Vault Web Access 9.9.5

Timelineinfo

02/28/2018 🔍
04/07/2018 +38 days 🔍
04/09/2018 +2 days 🔍
04/12/2018 +2 days 🔍
04/12/2018 +0 days 🔍
04/16/2018 +4 days 🔍
06/01/2018 +46 days 🔍
02/28/2023 +1733 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Status: Not defined

CVE: CVE-2018-9843 (🔍)
SecurityTracker: 1040675
SecurityFocus: 105180

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

Entryinfo

Created: 04/16/2018 09:11
Updated: 02/28/2023 08:57
Changes: 04/16/2018 09:11 (69), 01/25/2020 08:45 (5), 02/10/2021 07:42 (2), 02/28/2023 08:57 (3)
Complete: 🔍

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