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CVE-2020-10711

5.9 · MEDIUM

A NULL pointer dereference flaw was found in the Linux kernel's SELinux subsystem in versions before 5.7.

Published May 22, 2020CWE-476EPSS 3.08%

Overview

CVE-2020-10711 is a medium-severity vulnerability. It was published on May 22, 2020 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A NULL pointer dereference flaw was found in the Linux kernel's SELinux subsystem in versions before 5.7. This flaw occurs while importing the Commercial IP Security Option (CIPSO) protocol's category bitmap into the SELinux extensible bitmap via the' ebitmap_netlbl_import' routine. While processing the CIPSO restricted bitmap tag in the 'cipso_v4_parsetag_rbm' routine, it sets the security attribute to indicate that the category bitmap is present, even if it has not been allocated. This issue leads to a NULL pointer dereference issue while importing the same category bitmap into SELinux. This flaw allows a remote network user to crash the system kernel, resulting in a denial of service.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.opensuse.org/opensuse-security-announce/2020-06/msg00022.htmlReflists.opensuse.org/opensuse-security-announce/2020-07/msg00008.htmlRefbugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10711Reflists.debian.org/debian-lts-announce/2020/06/msg00012.htmlRefsecurity.netapp.com/advisory/ntap-20200608-0001/Refusn.ubuntu.com/4411-1/Refusn.ubuntu.com/4412-1/Refusn.ubuntu.com/4413-1/Refusn.ubuntu.com/4414-1/Refusn.ubuntu.com/4419-1/

How CyberStrike helps

Frequently asked questions

What is CVE-2020-10711?

CVE-2020-10711 is a medium-severity vulnerability. It was published on May 22, 2020 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2020-10711?

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-10711?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-10711?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-10711 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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