#VU10307 Security restrictions bypass in Rsync - CVE-2018-5764

Vulnerability identifier: #VU10307

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-5764

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Rsync
Server applications / Other server solutions

Vendor: Samba

Description
The vulnerability allows a remote attacker to bypass security controls on the target system.

The weakness exists in the parse_arguments() function in 'options.c' due to insufficient validation of user-supplied input. A remote attacker can send multiple '--protect-args' values and  bypass the argument-sanitization protection mechanism.

Mitigation
Update to version 3.1.3.

Vulnerable software versions

Rsync: 3.1.0 - 3.1.2

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External links
https://download.samba.org/pub/rsync/src-previews/rsync-3.1.3pre1-NEWS

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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.