Red Hat Enterprise Linux 7 Extras update for runc



Published: 2020-03-25
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-19921
CWE-ID CWE-284
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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runc (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux for Power, little endian
Operating systems & Components / Operating system

Red Hat Enterprise Linux for IBM z Systems
Operating systems & Components / Operating system

Red Hat Enterprise Linux Workstation
Operating systems & Components / Operating system

Red Hat Enterprise Linux Server
Operating systems & Components / Operating system

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper access control

EUVDB-ID: #VU25847

Risk: Low

CVSSv3.1: 6 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-19921

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a local user to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions, related to libcontainer/rootfs_linux.go in runc. A local user with ability to spawn two containers with custom volume-mount configurations, and run custom images can escalate privileges on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

runc (Red Hat package): 1.0.0-1.rc2.el7, 1.0.0-24.rc4.dev.gitc6e4a1e.el7, 1.0.0-59.dev.git2abd837.el7

Red Hat Enterprise Linux for Power, little endian: 7

Red Hat Enterprise Linux for IBM z Systems: 7

Red Hat Enterprise Linux Workstation: 7

Red Hat Enterprise Linux Server: 7

CPE2.3 External links

http://access.redhat.com/errata/RHSA-2020:0942

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. However, proof of concept for this vulnerability is available.



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