Arbitrary client-side file overwrite in Rsync

1) Path traversal

EUVDB-ID: #VU66189

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-29154

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

Exploit availability: No

Description

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

The vulnerability exists due to input validation error within the rsync client  when processing file names. A remote malicious server overwrite arbitrary files in the rsync client target directory and subdirectories on the connected peer.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Rsync: 3.2.0 - 3.2.4pre4

CPE2.3

• cpe:2.3:a:samba:rsync:3.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:samba:rsync:3.2.0pre1:*:*:*:*:*:*:*
• cpe:2.3:a:samba:rsync:3.2.0pre2:*:*:*:*:*:*:*

External links

https://www.openwall.com/lists/oss-security/2022/08/02/1

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.