Fedora 27 update for rsync

1) Security restrictions bypass

EUVDB-ID: #VU10307

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 - Improper input validation

Exploit availability: No

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

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 27

rsync: before 3.1.3-1.fc27

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:27:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:rsync:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2018-d0ebfab3f3

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.