Ubuntu update for IBus

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU21199

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-14822

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to iBus does not check user privileges when allowing connection to the AF_UNIX socket. A local user can connect to an existing AF_UNIX socket and perform arbitrary actions, such read and send messages on behalf of another user connected on a graphical environment. 

Mitigation

Update the affected packages.

Ubuntu 19.10

ibus - 1.5.21-1~exp2ubuntu2.1

Ubuntu 18.04 LTS

ibus - 1.5.17-3ubuntu5.3

Ubuntu 16.04 LTS

ibus - 1.5.11-1ubuntu2.4

Vulnerable software versions

ibus (Ubuntu package): 1.5.11-1ubuntu2 - 1.5.17-3ubuntu5.2

External links

http://usn.ubuntu.com/4134-3/

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.