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CVE-2024-43845

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: udf: Fix bogus checksum computation in udf_rename() Syzbot reports uninitialized memory access in udf_rename() when updating ch…

Published Aug 17, 2024CWE-908EPSS 0.22%

Overview

CVE-2024-43845 is a high-severity vulnerability. It was published on August 17, 2024 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

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

udf: Fix bogus checksum computation in udf_rename()

Syzbot reports uninitialized memory access in udf_rename() when updating

checksum of '..' directory entry of a moved directory. This is indeed

true as we pass on-stack diriter.fi to the udf_update_tag() and because

that has only struct fileIdentDesc included in it and not the impUse or

name fields, the checksumming function is going to checksum random stack

contents beyond the end of the structure. This is actually harmless

because the following udf_fiiter_write_fi() will recompute the checksum

from on-disk buffers where everything is properly included. So all that

is needed is just removing the bogus calculation.

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/27ab33854873e6fb958cb074681a0107cc2ecc4cRefgit.kernel.org/stable/c/40d7b3ed52449d36143bab8d3e70926aa61a60f4Refgit.kernel.org/stable/c/9c439311c13fc6faab1921441165c9b8b500c83bRefgit.kernel.org/stable/c/fe2ead240c31e8d158713beca9d0681a6e6a53ab

How CyberStrike helps

Frequently asked questions

What is CVE-2024-43845?

CVE-2024-43845 is a high-severity vulnerability. It was published on August 17, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-43845?

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-2024-43845?

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-2024-43845?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-43845 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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