CVE-2019-5736

Description

runc through 1.0-rc6, as used in Docker before 18.09.2 and other products, allows attackers to overwrite the host runc binary (and consequently obtain host root access) by leveraging the ability to execute a command as root within one of these types of containers: (1) a new container with an attacker-controlled image, or (2) an existing container, to which the attacker previously had write access, that can be attached with docker exec. This occurs because of file-descriptor mishandling, related to /proc/self/exe.

How to fix CVE-2019-5736

To remediate CVE-2019-5736, upgrade the affected package to a fixed version below.

• —upgrade to 3.1.0-r1 or later
• —upgrade to 1:3.1.0+really3.0.3-4 or later
• —upgrade to 1.0.0~rc6+dfsg1-2 or later

Is CVE-2019-5736 being exploited?

Likely — EPSS is 55.3%, placing CVE-2019-5736 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.

Affected packages (3)

• from 0, < 3.1.0-r1
• from 0, < 1:3.1.0+really3.0.3-4
• from 0, < 1.0.0~rc6+dfsg1-2

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2019-5736
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2019-5736