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CVE-2024-39480

8.4 · HIGH

In the Linux kernel, the following vulnerability has been resolved: kdb: Fix buffer overflow during tab-complete Currently, when the user attempts symbol completion with the Tab key, kdb will use…

Published Jul 5, 2024CWE-120EPSS 0.27%

Overview

CVE-2024-39480 is a high-severity vulnerability. It was published on July 5, 2024 and has a CVSS 3.1 base score of 8.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

kdb: Fix buffer overflow during tab-complete

Currently, when the user attempts symbol completion with the Tab key, kdb

will use strncpy() to insert the completed symbol into the command buffer.

Unfortunately it passes the size of the source buffer rather than the

destination to strncpy() with predictably horrible results. Most obviously

if the command buffer is already full but cp, the cursor position, is in

the middle of the buffer, then we will write past the end of the supplied

buffer.

Fix this by replacing the dubious strncpy() calls with memmove()/memcpy()

calls plus explicit boundary checks to make sure we have enough space

before we start moving characters around.

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

Refgit.kernel.org/stable/c/107e825cc448b7834b31e8b1b3cf0f57426d46d5Refgit.kernel.org/stable/c/33d9c814652b971461d1e30bead6792851c209e7Refgit.kernel.org/stable/c/cfdc2fa4db57503bc6d3817240547c8ddc55fa96Refgit.kernel.org/stable/c/ddd2972d8e2dee3b33e8121669d55def59f0be8aRefgit.kernel.org/stable/c/e9730744bf3af04cda23799029342aa3cddbc454Refgit.kernel.org/stable/c/f636a40834d22e5e3fc748f060211879c056cd33Refgit.kernel.org/stable/c/f694da720dcf795dc3eb97bf76d220213f76aaa7Refgit.kernel.org/stable/c/fb824a99e148ff272a53d71d84122728b5f00992Refgit.kernel.org/stable/c/107e825cc448b7834b31e8b1b3cf0f57426d46d5Refgit.kernel.org/stable/c/33d9c814652b971461d1e30bead6792851c209e7

How CyberStrike helps

Frequently asked questions

What is CVE-2024-39480?

CVE-2024-39480 is a high-severity vulnerability. It was published on July 5, 2024 and has a CVSS 3.1 base score of 8.4 (HIGH).

How severe is CVE-2024-39480?

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-39480?

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-2024-39480?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-39480 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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