Information disclosure in Opencast



| Updated: 2021-12-27
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-43821
CWE-ID CWE-552
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 Opencast
Other software / Other software solutions

Vendor Apereo Foundation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Files or Directories Accessible to External Parties

EUVDB-ID: #VU59086

Risk: Medium

CVSSv4.0: 5.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2021-43821

CWE-ID: CWE-552 - Files or Directories Accessible to External Parties

Exploit availability: Yes

Description

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due to a logic error that allows references to local file URLs in ingested media packages. A remote user can include arbitrary local files from Opencast's host machine and make them publicly available via the web interface.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Opencast: 1.3.0 - 10.5

CPE2.3 External links

https://github.com/opencast/opencast/security/advisories/GHSA-59g4-hpg3-3gcp
https://github.com/opencast/opencast/blob/69952463971cf578363e3b97d8edaf334ff51253/modules/ingest-service-impl/src/main/java/org/opencastproject/ingest/impl/IngestServiceImpl.java#L1587
https://mvnrepository.com/artifact/org.opencastproject/opencast-ingest-service-impl
https://github.com/opencast/opencast/commit/65c46b9d3e8f045c544881059923134571897764


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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