VDB-177100 · CVE-2021-32623 · GCVE-0-2021-32623

Opencast up to 9.5 HTTP Request xml entity expansion

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.
7.0	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic was found in Opencast up to 9.5. Affected by this vulnerability is an unknown functionality of the component HTTP Request Handler. Executing a manipulation can lead to xml entity expansion. This vulnerability is registered as CVE-2021-32623. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Opencast up to 9.5. It has been declared as critical. This vulnerability affects an unknown function of the component HTTP Request Handler. The manipulation with an unknown input leads to a xml entity expansion vulnerability. The CWE definition for the vulnerability is CWE-776. The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 06/16/2021. The advisory is shared for download at github.com. This vulnerability was named CVE-2021-32623. There are neither technical details nor an exploit publicly available.

Upgrading to version 9.6 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Opencast

Version

License

open-source

Website

Product: https://github.com/opencast/opencast/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: 🔍

Exploitinginfo

Class: Xml entity expansion
CWE: CWE-776
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: 🔍

0-Day Time: 🔍

Upgrade: Opencast 9.6
Patch: github.com

Timelineinfo

05/12/2021 🔍
06/16/2021 +35 days 🔍
06/16/2021 +0 days 🔍
06/18/2021 +2 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-32623 (🔍)
GCVE (CVE): GCVE-0-2021-32623
GCVE (VulDB): GCVE-100-177100

Entryinfo

Created: 06/16/2021 09:34
Updated: 06/18/2021 19:07
Changes: 06/16/2021 09:34 (38), 06/18/2021 18:59 (6), 06/18/2021 19:07 (1)
Complete: 🔍
Cache ID: 216::103