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CVE-2020-35512

7.8 · HIGH

A use-after-free flaw was found in D-Bus Development branch <= 1.13.16, dbus-1.12.x stable branch <= 1.12.18, and dbus-1.10.x and older branches <= 1.10.30 when a system has multiple usernames shar…

Published Feb 15, 2021CWE-416EPSS 0.33%

Overview

CVE-2020-35512 is a high-severity vulnerability. It was published on February 15, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

A use-after-free flaw was found in D-Bus Development branch <= 1.13.16, dbus-1.12.x stable branch <= 1.12.18, and dbus-1.10.x and older branches <= 1.10.30 when a system has multiple usernames sharing the same UID. When a set of policy rules references these usernames, D-Bus may free some memory in the heap, which is still used by data structures necessary for the other usernames sharing the UID, possibly leading to a crash or other undefined behaviors

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

Refbugs.gentoo.org/755392Refbugzilla.redhat.com/show_bug.cgi?id=1909101Refgitlab.freedesktop.org/dbus/dbus/-/issues/305#note_829128Refsecurity-tracker.debian.org/tracker/CVE-2020-35512Refbugs.gentoo.org/755392Refbugzilla.redhat.com/show_bug.cgi?id=1909101Refgitlab.freedesktop.org/dbus/dbus/-/issues/305#note_829128Refsecurity-tracker.debian.org/tracker/CVE-2020-35512

How CyberStrike helps

Frequently asked questions

What is CVE-2020-35512?

CVE-2020-35512 is a high-severity vulnerability. It was published on February 15, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2020-35512?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-35512?

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-2020-35512?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-35512 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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