Vulnerability · Published Jul 21, 2021 · Assigned by GitHub_M
CVE-2021-32744Unauthenticated attacker could gain access to currently open files
Critical 9.8
In plain English
A critical-severity authorization bypass via user-controlled key in online from CollaboraOnline. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities).
Official description
Collabora Online is a collaborative online office suite. In versions prior to 4.2.17-1 and version 6.4.9-5, unauthenticated attackers are able to gain access to files which are currently opened by other users in the Collabora Online editor. For successful exploitation the attacker is required to guess the file identifier - the predictability of this file identifier is dependent on external file-storage implementations (this is a potential "IDOR" - Insecure Direct Object Reference - vulnerability). Versions 4.2.17-1 and 6.4.9-5 contain patches for this issue. There is no known workaround except updating the Collabora Online application to one of the patched releases.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| CollaboraOnline | online | < 4.2.17-1>= 6.4.0, < 6.4.9-5 |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H