Oracle Communications Unified Assurance up to 5.5.7.0.0/6.0.0.0.0 REST API prototype pollution

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.7$5k-$25k0.00

Summaryinfo

A vulnerability classified as very critical has been found in Oracle Communications Unified Assurance up to 5.5.7.0.0/6.0.0.0.0. This impacts an unknown function of the component REST API. The manipulation leads to an unknown weakness. This vulnerability is referenced as CVE-2021-3918. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Oracle Communications Unified Assurance up to 5.5.7.0.0/6.0.0.0.0 (Cloud Software). This issue affects some unknown processing of the component REST API. Using CWE to declare the problem leads to CWE-1321. The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. Impacted is confidentiality, integrity, and availability.

The weakness was published 10/19/2022 as Oracle Critical Patch Update Advisory - October 2022. The advisory is shared at oracle.com. The identification of this vulnerability is CVE-2021-3918. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 05/18/2025). MITRE ATT&CK project uses the attack technique T1059 for this issue.

We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 236651 (Alibaba Cloud Linux 3 : 0014: nodejs:14 (ALINUX3-SA-2022:0014)), which helps to determine the existence of the flaw in a target environment.

A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (236651). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

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 (huntr.dev): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Prototype pollution
CWE: CWE-1321 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 236651
Nessus Name: Alibaba Cloud Linux 3 : 0014: nodejs:14 (ALINUX3-SA-2022:0014)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: github.com

Timelineinfo

11/02/2021 🔍
10/19/2022 +350 days 🔍
10/19/2022 +0 days 🔍
10/19/2022 +0 days 🔍
05/18/2025 +942 days 🔍

Sourcesinfo

Vendor: oracle.com

Advisory: Oracle Critical Patch Update Advisory - October 2022
Status: Confirmed

CVE: CVE-2021-3918 (🔍)
GCVE (CVE): GCVE-0-2021-3918
GCVE (VulDB): GCVE-100-211385

Entryinfo

Created: 10/19/2022 08:29
Updated: 05/18/2025 21:05
Changes: 10/19/2022 08:29 (38), 11/10/2022 14:49 (3), 11/10/2022 14:53 (28), 11/10/2022 14:56 (1), 01/17/2025 23:06 (15), 05/18/2025 21:05 (2)
Complete: 🔍
Cache ID: 216::103

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

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