Ubuntu update for GLib

Published: 2019-06-11 | Updated: 2019-06-11
Severity Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-12450
CWE ID CWE-264
Exploitation vector Local
Public exploit N/A
Vulnerable software glib2.0 (Ubuntu package) Subscribe
Vendor Canonical Ltd.

Security Advisory

This security advisory describes one low risk vulnerability.

1) Permissions, Privileges, and Access Controls

Severity: Low

CVSSv3: 3.9 [CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-12450

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

Description

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

The vulnerability exists due to the application applies default directory permissions to files while copying them in file_copy_fallback() function in gio/gfile.c. A local user can interfere with the copying operation and gain access to otherwise restricted files, as the application applies correct access permissions after the file was copied only.

Such application behavior allows a local user to access potentially sensitive data or modify file contents in case directory permissions that were applied to the file allow such operations.

Mitigation

Update the affected packages.

Ubuntu 19.04
libglib2.0-0 - 2.60.0-1ubuntu0.1
libglib2.0-bin - 2.60.0-1ubuntu0.1
libglib2.0-dev - 2.60.0-1ubuntu0.1
Ubuntu 18.10
libglib2.0-0 - 2.58.1-2ubuntu0.1
libglib2.0-bin - 2.58.1-2ubuntu0.1
libglib2.0-dev - 2.58.1-2ubuntu0.1
Ubuntu 18.04 LTS
libglib2.0-0 - 2.56.4-0ubuntu0.18.04.3
libglib2.0-bin - 2.56.4-0ubuntu0.18.04.3
libglib2.0-dev - 2.56.4-0ubuntu0.18.04.3
Ubuntu 16.04 LTS
libglib2.0-0 - 2.48.2-0ubuntu4.2
libglib2.0-bin - 2.48.2-0ubuntu4.2
libglib2.0-dev - 2.48.2-0ubuntu4.2

Vulnerable software versions

glib2.0 (Ubuntu package): 2.2.0-1, 2.2.0-2, 2.2.1-1, 2.2.1-2, 2.2.1-3, 2.2.2-1, 2.2.3-1, 2.4.0-1, 2.4.0-2, 2.4.1-1, 2.4.1-2, 2.4.2-1, 2.4.4-1, 2.4.5-1, 2.4.5-2, 2.4.6-1, 2.4.6-2, 2.4.6-3, 2.4.6-4, 2.4.7-1, 2.4.8-1, 2.6.0-1, 2.6.1-1, 2.6.1-2, 2.6.1-3, 2.6.2-1, 2.6.3-1, 2.6.4-1, 2.6.5-1, 2.7.0-1, 2.7.1-1, 2.7.2-1, 2.7.3-1, 2.8.0-1, 2.8.1-0ubuntu1, 2.8.1-1, 2.8.2-1, 2.8.3-1, 2.8.4-1, 2.8.4-2, 2.8.5-1, 2.8.6-1, 2.10.0-1, 2.10.1-1, 2.10.1-2, 2.10.2-1, 2.10.2-2, 2.10.3-1, 2.10.3-2, 2.10.3-3, 2.12.0-1, 2.12.1-1, 2.12.2-1, 2.12.3-1, 2.12.3-2, 2.12.4-1, 2.12.4-2, 2.12.5-1, 2.12.5-2, 2.12.5-3, 2.12.6-1, 2.12.6-2, 2.12.7-1, 2.12.9-1, 2.12.9-2, 2.12.10-1, 2.12.11-1, 2.12.11-2, 2.12.11-3, 2.12.12-1, 2.13.4-1, 2.13.4-2, 2.13.5-1, 2.13.6-1, 2.13.7-1, 2.13.7-2, 2.13.7-3, 2.14.0-1, 2.14.0-2, 2.14.1-1, 2.14.1-2, 2.14.1-3, 2.14.1-4, 2.14.1-5, 2.14.2-1, 2.14.3-1, 2.14.4-1, 2.14.4-2, 2.15.2-1, 2.15.2-2, 2.15.2-3, 2.15.3-1, 2.15.4-1, 2.15.5-1, 2.15.6-1, 2.16.0-1, 2.16.1-1, 2.16.1-2, 2.16.2-1, 2.16.3-1, 2.16.3-2, 2.17.0-1, 2.17.2-1, 2.17.3-1, 2.17.3-2, 2.17.4-1, 2.17.6-1, 2.17.7-1, 2.18.0-1, 2.18.1-1, 2.18.2-1, 2.18.3-1, 2.18.4-1, 2.18.4-2, 2.19.6-1, 2.19.7-1, 2.19.8-1, 2.19.8-2, 2.19.10-1, 2.20.0-1, 2.20.0-2, 2.20.0-3, 2.20.1-1, 2.20.1-2, 2.20.3-1, 2.20.4-1, 2.21.4-1, 2.21.5-1, 2.21.6-1, 2.22.0-1, 2.22.0-2, 2.22.1-1, 2.22.2-1, 2.22.2-2, 2.23.0-1, 2.23.1-1, 2.23.2-1, 2.23.2-2, 2.23.3-1, 2.23.4-1, 2.23.5-1, 2.23.6-1, 2.24.0-1, 2.25.1-1, 2.25.2-1, 2.25.3-1, 2.25.4-1, 2.25.5-1, 2.25.6-1, 2.25.7-1, 2.25.8-1, 2.25.9-1, 2.25.10-1, 2.25.11-1, 2.25.11-2, 2.25.11-3, 2.25.12-1, 2.25.12-2, 2.25.13-1, 2.25.14-1, 2.25.15-1, 2.25.16-1, 2.26.0-1, 2.27.0-1, 2.27.1-1, 2.27.2-1, 2.27.3-1, 2.27.4-1, 2.27.4-2, 2.27.5-1, 2.27.90-1, 2.27.90-2, 2.27.91-1, 2.28.0-1, 2.28.0-2, 2.28.1-1, 2.28.2-1, 2.28.4-1, 2.28.6-1, 2.28.6-2, 2.28.6-3, 2.28.6-4, 2.28.8-1, 2.30.1-1, 2.30.1-2, 2.30.2-1, 2.30.2-2, 2.30.2-3, 2.30.2-4, 2.30.2-5, 2.30.2-6, 2.30.2-7, 2.31.8-1, 2.31.18-1, 2.31.18-2, 2.31.18-3, 2.31.20-1, 2.31.22-1, 2.32.0-1, 2.32.0-2, 2.32.0-3, 2.32.0-4, 2.32.1-1, 2.32.2-1, 2.32.3-1, 2.33.1-1, 2.33.2-1, 2.33.3-1, 2.33.3-2, 2.33.4-1, 2.33.6-1, 2.33.8-1, 2.33.12+really2.32.3-1, 2.33.12+really2.32.3-2, 2.33.12+really2.32.4-1, 2.33.12+really2.32.4-2, 2.33.12+really2.32.4-3, 2.33.12+really2.32.4-4, 2.33.12+really2.32.4-5, 2.33.12-1, 2.33.12-2, 2.33.12-3, 2.33.12-4, 2.33.14-1, 2.34.0-1, 2.34.1-1, 2.34.1-2, 2.34.2-1, 2.34.3-1, 2.35.8-1, 2.35.9-1, 2.35.9-2, 2.36.0-1, 2.36.0-2, 2.36.1-1, 2.36.1-2, 2.36.3-1, 2.36.3-2, 2.36.3-3, 2.36.3-4, 2.36.4-1, 2.37.2-1, 2.37.5-1, 2.37.6-1, 2.37.7-1, 2.37.93-1, 2.38.0-1, 2.38.1-1, 2.38.1-2, 2.38.2-1, 2.38.2-2, 2.38.2-3, 2.38.2-4, 2.38.2-5, 2.39.4-1, 2.39.90-1, 2.39.90-2, 2.39.91-1, 2.39.92-1, 2.39.92-2, 2.40.0-1, 2.40.0-2, 2.40.0-3, 2.40.0-4, 2.41.0-1, 2.41.0-2, 2.41.1-1, 2.41.1-2, 2.41.2-1, 2.41.3-1, 2.41.4-1, 2.41.5-1, 2.41.5-2, 2.42.0-1, 2.42.0-2, 2.42.1-1, 2.42.2-0ubuntu1, 2.43.1-1, 2.43.1-2, 2.43.2-1, 2.43.3-1, 2.43.4-1, 2.43.90-1, 2.43.91-1, 2.43.92-1, 2.44.0-1, 2.44.0-1ubuntu1, 2.44.0-1ubuntu2, 2.44.0-1ubuntu3, 2.44.0-2, 2.44.0-3, 2.44.1-1, 2.44.1-1ubuntu1, 2.45.1-1, 2.45.1-2, 2.45.2-1, 2.45.3-1, 2.45.4-1, 2.45.4-2, 2.45.6-1, 2.45.7-1, 2.45.8-1, 2.46.0-1, 2.46.0-2, 2.46.1-1, 2.46.1-2, 2.46.2-1, 2.46.2-1ubuntu1, 2.46.2-1ubuntu2, 2.46.2-2, 2.46.2-3, 2.47.1-1, 2.47.3-1, 2.47.3-2, 2.47.3-3, 2.47.4-1, 2.47.5-1, 2.47.6-1, 2.47.92-1, 2.48.0-1, 2.48.0-1ubuntu1, 2.48.0-1ubuntu2, 2.48.0-1ubuntu3, 2.48.0-1ubuntu4, 2.48.1-1, 2.48.1-1~ubuntu16.04.1, 2.48.1-2, 2.48.1-3, 2.48.2-0ubuntu1, 2.48.2-0ubuntu2, 2.48.2-0ubuntu3, 2.48.2-0ubuntu4, 2.48.2-0ubuntu4.1, 2.49.2-1, 2.49.2-2, 2.49.3-1, 2.49.4-1, 2.49.5-1, 2.49.5-2, 2.49.6-1, 2.49.7-1, 2.50.0-1, 2.50.0-2, 2.50.1-1, 2.50.2-1, 2.50.2-2, 2.50.2-2ubuntu1, 2.50.3-1, 2.50.3-2, 2.51.0-1, 2.51.0-2, 2.51.2-1, 2.51.4-1, 2.51.5-1, 2.52.0-1, 2.52.3-1, 2.53.1-1, 2.53.2-1, 2.53.3-1, 2.53.4-1, 2.53.4-2, 2.53.4-3, 2.53.6-1, 2.53.7-1, 2.54.0-1, 2.54.1-1, 2.54.2-1, 2.54.2-2, 2.54.2-3, 2.54.2-4, 2.54.2-5, 2.54.3-1, 2.54.3-2, 2.55.1-1, 2.55.2-1, 2.55.2-2, 2.56.0-1, 2.56.0-2, 2.56.0-3, 2.56.0-4, 2.56.0-5, 2.56.0-6, 2.56.1-1, 2.56.1-2, 2.57.2-1, 2.57.2-2, 2.58.0-1, 2.58.0-2, 2.58.0-3, 2.58.0-4, 2.58.1-1, 2.58.1-2, 2.58.1-3, 2.58.1-4, 2.58.1-5, 2.58.1-6, 2.58.2-1, 2.58.2-2, 2.58.2-3, 2.58.2-4, 2.59.0-1, 2.59.2-1, 2.59.2-2, 2.59.3-1, 2.59.3-2, 2.60.0-1

CPE External links

https://usn.ubuntu.com/4014-1/

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.