Arbitrary file system write in Adobe Digital Editions

1) Path traversal

EUVDB-ID: #VU52185

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-21100

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can trick the victim to open a specially crafted file and overwrite arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Adobe Digital Editions : 4.0 - 4.5.11.187303

External links

http://helpx.adobe.com/security/products/Digital-Editions/apsb21-26.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.