Ubuntu update for libseccomp

Published: 2019-05-31

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2019-9893
CWE-ID	CWE-682
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	libseccomp (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Incorrect calculation

EUVDB-ID: #VU18322

Risk: Low

CVSSv3.1: 3.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-9893

CWE-ID: CWE-682 - Incorrect Calculation

Exploit availability: No

Description

The vulnerability allows a local user to bypass certain security restrictions.

The vulnerability exists due to incorrect 64-bit syscall argument comparison when using arithmetic operators, such as LT, GT, LE, or GE. A local user can bypass seccomp filters and gain elevated privileges on the system.

Mitigation

Update the affected packages.

Ubuntu 19.04: libseccomp2 - 2.4.1-0ubuntu0.19.04.3
Ubuntu 18.10: libseccomp2 - 2.4.1-0ubuntu0.18.10.3
Ubuntu 18.04 LTS: libseccomp2 - 2.4.1-0ubuntu0.18.04.2
Ubuntu 16.04 LTS: libseccomp2 - 2.4.1-0ubuntu0.16.04.2

Vulnerable software versions

libseccomp (Ubuntu package): 2.3.0-1 - 2.3.3-3ubuntu2

External links

http://usn.ubuntu.com/4001-1/

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.