Ubuntu update for rsync

Published: 2017-12-07

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-17433 CVE-2017-17434
CWE-ID	CWE-284
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Ubuntu Operating systems & Components / Operating system
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Security restrictions bypass

EUVDB-ID: #VU9608

Risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-17433

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

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

The weakness exists due to the recv_files function in receiver.c in the daemon proceeds with certain file metadata updates before checking for a filename in the daemon_filter_list data structure. A remote attacker can bypass intended access restrictions.

Mitigation

Update the affected packages

Ubuntu 17.10:

rsync 3.1.2-2ubuntu0.1

Ubuntu 17.04:

rsync 3.1.2-1ubuntu0.1

Ubuntu 16.04 LTS:

rsync 3.1.1-3ubuntu1.1

Ubuntu 14.04 LTS:

rsync 3.1.0-2ubuntu0.3

Vulnerable software versions

Ubuntu: 14.04 - 17.10

External links

http://www.ubuntu.com/usn/usn-3506-1/

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.

2) Security restrictions bypass

EUVDB-ID: #VU9609