Ubuntu update for Expat

1) Buffer overflow in Tenable Nessus

EUVDB-ID: #VU200

Risk: Critical

CVSSv3.1: 8.3 [AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-0718

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to boundary error when handling malformed input documents. A remote unauthenticated attacker can trigger a buffer overflow in the Expat XML parser library and execute arbitrary code by sending specially crafted data to vulnerable server.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages

Ubuntu 16.04 LTS:

libexpat1 2.1.0-7ubuntu0.16.04.1

lib64expat1 2.1.0-7ubuntu0.16.04.1

Ubuntu 15.10:

libexpat1 2.1.0-7ubuntu0.15.10.1

lib64expat1 2.1.0-7ubuntu0.15.10.1

Ubuntu 14.04 LTS:

libexpat1 2.1.0-4ubuntu1.2

lib64expat1 2.1.0-4ubuntu1.2

Ubuntu 12.04 LTS:

libexpat1 2.0.1-7.2ubuntu1.3

lib64expat1 2.0.1-7.2ubuntu1.3

Vulnerable software versions

Ubuntu: 12.04 - 16.04

External links

http://www.ubuntu.com/usn/usn-2983-1/

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.