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CVE-2024-45009

8.2 · HIGH

In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: only decrement add_addr_accepted for MPJ req Adding the following warning ...

Published Sep 11, 2024EPSS 0.52%

Overview

CVE-2024-45009 is a high-severity vulnerability. It was published on September 11, 2024 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

mptcp: pm: only decrement add_addr_accepted for MPJ req

Adding the following warning ...

WARN_ON_ONCE(msk->pm.add_addr_accepted == 0)

... before decrementing the add_addr_accepted counter helped to find a

bug when running the "remove single subflow" subtest from the

mptcp_join.sh selftest.

Removing a 'subflow' endpoint will first trigger a RM_ADDR, then the

subflow closure. Before this patch, and upon the reception of the

RM_ADDR, the other peer will then try to decrement this

add_addr_accepted. That's not correct because the attached subflows have

not been created upon the reception of an ADD_ADDR.

A way to solve that is to decrement the counter only if the attached

subflow was an MP_JOIN to a remote id that was not 0, and initiated by

the host receiving the RM_ADDR.

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/1c1f721375989579e46741f59523e39ec9b2a9bdRefgit.kernel.org/stable/c/2060f1efab370b496c4903b840844ecaff324c3cRefgit.kernel.org/stable/c/35b31f5549ede4070566b949781e83495906b43dRefgit.kernel.org/stable/c/85b866e4c4e63a1d7afb58f1e24273caad03d0b7Refgit.kernel.org/stable/c/d20bf2c96d7ffd171299b32f562f70e5bf5dc608Reflists.debian.org/debian-lts-announce/2025/01/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-45009?

CVE-2024-45009 is a high-severity vulnerability. It was published on September 11, 2024 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2024-45009?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-45009?

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-2024-45009?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-45009 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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