Ubuntu update for rsync

Published: 2018-01-23

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-16548 CVE-2018-5764
CWE-ID	CWE-126 CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Ubuntu Operating systems & Components / Operating system
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Heap-based buffer over-read

EUVDB-ID: #VU9720

Risk: Low

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

CVE-ID: CVE-2017-16548

CWE-ID: CWE-126 - Buffer over-read

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to the receive_xattr function in xattrs.c does not check for a trailing '' character in an xattr name. A remote attacker can send specially crafted data to the daemon, trigger heap-based buffer over-read and cause the application to crash.

Mitigation

Update the affected packages

Ubuntu 17.10:

rsync 3.1.2-2ubuntu0.2

Ubuntu 16.04 LTS:

rsync 3.1.1-3ubuntu1.2

Ubuntu 14.04 LTS:

rsync 3.1.0-2ubuntu0.4

Vulnerable software versions

Ubuntu: 14.04 - 17.10

CPE2.3

External links

https://www.ubuntu.com/usn/usn-3543-1/

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: #VU10307