VDB-197981 · CVE-2021-39275 · GCVE-0-2021-39275

Oracle HTTP Server 12.2.1.3.0/12.2.1.4.0 Web Listener 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	$25k-$100k	0.00

Summaryinfo

A vulnerability was found in Oracle HTTP Server 12.2.1.3.0/12.2.1.4.0. It has been rated as very critical. This vulnerability affects unknown code of the component Web Listener. The manipulation leads to an unknown weakness. This vulnerability is documented as CVE-2021-39275. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Oracle HTTP Server 12.2.1.3.0/12.2.1.4.0 (Web Server). It has been rated as very critical. This issue affects an unknown function of the component Web Listener. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability.

The weakness was released 04/19/2022 as Oracle Critical Patch Update Advisory - April 2022. The advisory is shared at oracle.com. The identification of this vulnerability is CVE-2021-39275. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $25k-$100k at the moment (estimation calculated on 05/01/2025).

We expect the 0-day to have been worth approximately $100k and more.

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

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Web Server

Vendor

Oracle

Name

HTTP Server

Version

License

commercial

Website

Vendor: https://www.oracle.com

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

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

08/18/2021 🔍
04/19/2022 +244 days 🔍
04/19/2022 +0 days 🔍
04/20/2022 +1 days 🔍
05/01/2025 +1107 days 🔍

Sourcesinfo

Vendor: oracle.com

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

CVE: CVE-2021-39275 (🔍)
GCVE (CVE): GCVE-0-2021-39275
GCVE (VulDB): GCVE-100-197981

Entryinfo

Created: 04/20/2022 08:00
Updated: 05/01/2025 17:57
Changes: 04/20/2022 08:00 (39), 04/25/2022 08:42 (2), 04/25/2022 08:46 (18), 05/01/2025 17:57 (15)
Complete: 🔍
Cache ID: 216::103