Oracle Enterprise Telephony Fraud Monitor 3.4/4.2/4.3/4.4 nginx off-by-one

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.
8.9$0-$5k0.00

Summaryinfo

A vulnerability classified as very critical has been found in Oracle Enterprise Telephony Fraud Monitor 3.4/4.2/4.3/4.4. This affects an unknown function of the component nginx. This manipulation causes an unknown weakness. This vulnerability is tracked as CVE-2021-23017. The attack is possible to be carried out remotely. Moreover, an exploit is present. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Oracle Enterprise Telephony Fraud Monitor 3.4/4.2/4.3/4.4. It has been declared as very critical. Affected by this vulnerability is some unknown processing of the component nginx. The CWE definition for the vulnerability is CWE-193. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 10/19/2021 as Oracle Critical Patch Update Advisory - October 2021. It is possible to read the advisory at oracle.com. This vulnerability is known as CVE-2021-23017. Technical details are unknown but a public exploit is available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/16/2025).

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $100k and more. The vulnerability scanner Nessus provides a plugin with the ID 236746 (Alibaba Cloud Linux 3 : 0036: nginx:1.18 (ALINUX3-SA-2021:0036)), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the databases at Exploit-DB (50973) and Tenable (236746). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.4
VulDB Meta Temp Score: 8.9

VulDB Base Score: 9.4
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.4
NVD Vector: 🔍

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: Off-by-one
CWE: CWE-193 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
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: 236746
Nessus Name: Alibaba Cloud Linux 3 : 0036: nginx:1.18 (ALINUX3-SA-2021:0036)

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

01/06/2021 🔍
10/19/2021 +285 days 🔍
10/19/2021 +0 days 🔍
10/20/2021 +1 days 🔍
05/16/2025 +1304 days 🔍

Sourcesinfo

Vendor: oracle.com

Advisory: Oracle Critical Patch Update Advisory - October 2021
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-23017 (🔍)
GCVE (CVE): GCVE-0-2021-23017
GCVE (VulDB): GCVE-100-184687
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/20/2021 08:09
Updated: 05/16/2025 02:00
Changes: 10/20/2021 08:09 (38), 10/23/2021 19:06 (3), 10/23/2021 19:14 (18), 10/17/2024 09:26 (23), 05/16/2025 02:00 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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