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CVE-2023-34319

7.8 · HIGH

The fix for XSA-423 added logic to Linux'es netback driver to deal with a frontend splitting a packet in a way such that not all of the headers would come in one piece.

Published Sep 22, 2023CWE-787EPSS 0.29%

Overview

CVE-2023-34319 is a high-severity vulnerability. It was published on September 22, 2023 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

The fix for XSA-423 added logic to Linux'es netback driver to deal with

a frontend splitting a packet in a way such that not all of the headers

would come in one piece. Unfortunately the logic introduced there

didn't account for the extreme case of the entire packet being split

into as many pieces as permitted by the protocol, yet still being

smaller than the area that's specially dealt with to keep all (possible)

headers together. Such an unusual packet would therefore trigger a

buffer overrun in the driver.

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

Refpacketstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.htmlReflists.debian.org/debian-lts-announce/2024/01/msg00004.htmlRefsecurity.netapp.com/advisory/ntap-20240202-0001/Refxenbits.xenproject.org/xsa/advisory-432.htmlRefpacketstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.htmlRefxenbits.xen.org/xsa/advisory-432.htmlReflists.debian.org/debian-lts-announce/2023/10/msg00027.htmlReflists.debian.org/debian-lts-announce/2024/01/msg00004.htmlRefsecurity.netapp.com/advisory/ntap-20240202-0001/Refxenbits.xenproject.org/xsa/advisory-432.html

How CyberStrike helps

Frequently asked questions

What is CVE-2023-34319?

CVE-2023-34319 is a high-severity vulnerability. It was published on September 22, 2023 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-34319?

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-2023-34319?

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-2023-34319?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-34319 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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