1) Improper Authorization

Risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-28093

CWE-ID: CWE-285 - Improper Authorization

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authorization checks.

The vulnerability exists due to the affeczed cache uses a weak mechanisms (Adler32) to create cache keys. A remote authenticated attacker can swap image content by hash key colissions.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OX Documents: before 7.10.3-rev14, 7.10.4-rev8, 7.10.5-rev5

CPE

• cpe:2.3:a:ox_software_gmbh:ox_documents:*:*:*:*:*:*:*:*

External links

https://seclists.org/fulldisclosure/2021/Jul/37

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.