Ubuntu update for GNU cpio

1) Input validation error

EUVDB-ID: #VU22598

Risk: Low

CVSSv3.1: 2.6 [CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-14866

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to GNU cpio does not properly validate files when writing tar headers during tar archive creation. A local user can trick the victim into creating a tar archive out of a directory with specially crafted files. As a result the generated archive may contain files that the attacker does not have access to.

Mitigation

Update the affected packages.

Ubuntu 19.10

cpio - 2.12+dfsg-9ubuntu0.1

Ubuntu 19.04

cpio - 2.12+dfsg-6ubuntu0.19.04.1

Ubuntu 18.04 LTS

cpio - 2.12+dfsg-6ubuntu0.18.04.1

Ubuntu 16.04 LTS

cpio - 2.11+dfsg-5ubuntu1.1

Ubuntu 14.04 ESM

cpio - 2.11+dfsg-1ubuntu1.2+esm1

Ubuntu 12.04 ESM

cpio - 2.11-7ubuntu3.3

Vulnerable software versions

cpio (Ubuntu package): 2.4.2-7 - 2.12+dfsg-9

External links

http://usn.ubuntu.com/4176-1/

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.