Ubuntu update for shadow

Published: 2017-05-16

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2016-6252 CVE-2017-2616
CWE-ID	CWE-190 CWE-362
Exploitation vector	Local
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) Integer overflow

EUVDB-ID: #VU6431

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-6252

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code on the target system with escalated privileges.

The vulnerability exists due to integer overflow in shadow-utils. A local user can execute arbitrary code on the target system with root privileges.

Mitigation

Update the affected packages

Ubuntu 17.04:

passwd 1:4.2-3.2ubuntu1.17.04.2

uidmap 1:4.2-3.2ubuntu1.17.04.2

Ubuntu 16.10:

passwd 1:4.2-3.2ubuntu1.16.10.2

uidmap 1:4.2-3.2ubuntu1.16.10.2

Ubuntu 16.04 LTS:

passwd 1:4.2-3.1ubuntu5.3

uidmap 1:4.2-3.1ubuntu5.3

Ubuntu 14.04 LTS:

passwd 1:4.1.5.1-1ubuntu9.5

uidmap 1:4.1.5.1-1ubuntu9.5

Vulnerable software versions

Ubuntu: 14.04 - 17.04

CPE2.3

External links

https://www.ubuntu.com/usn/usn-3276-2/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Race condition

EUVDB-ID: #VU6432