Ubuntu update for systemd



Published: 2019-04-08
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-3842
CWE-ID CWE-264
Exploitation vector Local
Public exploit N/A
Vulnerable software
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systemd (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU18153

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-2019-3842

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 pam_systemd creates a user session using environmental parameters. A local user can spoof an active session and gain additional PolicyKit privileges.

Mitigation

Update the affected packages.

Ubuntu 18.10
libpam-systemd - 239-7ubuntu10.12
Ubuntu 18.04 LTS
libpam-systemd - 237-3ubuntu10.19
Ubuntu 16.04 LTS
libpam-systemd - 229-4ubuntu21.21
Ubuntu 14.04 LTS
libpam-systemd - 204-5ubuntu20.31

Vulnerable software versions

systemd (Ubuntu package): 204-5ubuntu20.1 - 239-7ubuntu10.11

External links

http://usn.ubuntu.com/3938-1/


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.



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