Oracle Communications User Data Repository 12.4.0 Platform out-of-bounds write

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.
9.6$5k-$25k0.00

Summaryinfo

A vulnerability was found in Oracle Communications User Data Repository 12.4.0. It has been declared as very critical. Affected by this vulnerability is an unknown functionality of the component Platform. Executing a manipulation can lead to an unknown weakness. This vulnerability is registered as CVE-2021-43527. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as very critical was found in Oracle Communications User Data Repository 12.4.0 (Cloud Software). This vulnerability affects some unknown processing of the component Platform. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 10/19/2022 as Oracle Critical Patch Update Advisory - October 2022. The advisory is shared for download at oracle.com. This vulnerability was named CVE-2021-43527. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 05/16/2025).

As 0-day the estimated underground price was around $100k and more. The vulnerability scanner Nessus provides a plugin with the ID 236713 (Alibaba Cloud Linux 3 : 0081: nss (ALINUX3-SA-2021:0081)), 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 (236713). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

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

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
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: 236713
Nessus Name: Alibaba Cloud Linux 3 : 0081: nss (ALINUX3-SA-2021:0081)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

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

Timelineinfo

11/08/2021 🔍
10/19/2022 +344 days 🔍
10/19/2022 +0 days 🔍
10/19/2022 +0 days 🔍
05/16/2025 +940 days 🔍

Sourcesinfo

Vendor: oracle.com

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

CVE: CVE-2021-43527 (🔍)
GCVE (CVE): GCVE-0-2021-43527
GCVE (VulDB): GCVE-100-211420

Entryinfo

Created: 10/19/2022 08:29
Updated: 05/16/2025 19:58
Changes: 10/19/2022 08:29 (38), 11/10/2022 23:35 (2), 11/10/2022 23:45 (19), 05/16/2025 19:58 (16)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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