CVE-2024-45009: mptcp: pm: only decrement add_addr_accepted for MPJ req
First published: Wed Sep 11 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.10<5.15.167 | |
| Linux Kernel | >=5.16<6.1.107 | |
| Linux Kernel | >=6.2<6.6.48 | |
| Linux Kernel | >=6.7<6.10.7 | |
| Linux Kernel | =6.11-rc1 | |
| Linux Kernel | =6.11-rc2 | |
| Linux Kernel | =6.11-rc3 | |
| Linux Kernel | =6.11-rc4 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.123-1 6.1.119-1 6.12.11-1 6.12.12-1 |
| debian/linux-6.1 | 6.1.119-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/1c1f721375989579e46741f59523e39ec9b2a9bd
- https://git.kernel.org/stable/c/2060f1efab370b496c4903b840844ecaff324c3c
- https://git.kernel.org/stable/c/35b31f5549ede4070566b949781e83495906b43d
- https://git.kernel.org/stable/c/85b866e4c4e63a1d7afb58f1e24273caad03d0b7
- https://git.kernel.org/stable/c/d20bf2c96d7ffd171299b32f562f70e5bf5dc608
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-45009
- https://nvd.nist.gov/vuln/detail/CVE-2024-45009
- https://launchpad.net/bugs/cve/CVE-2024-45009
- https://security-tracker.debian.org/tracker/CVE-2024-45009
- https://ubuntu.com/security/CVE-2024-45009
- https://git.kernel.org/linus/1c1f721375989579e46741f59523e39ec9b2a9bd
Frequently Asked Questions
What is the severity of CVE-2024-45009?
The severity of CVE-2024-45009 is determined by its impact on the Linux kernel and its vulnerability to exploitation.
How do I fix CVE-2024-45009?
To fix CVE-2024-45009, update your Linux kernel to version 6.1.123-1 or one of the other remedied versions listed.
Which Linux kernel versions are affected by CVE-2024-45009?
CVE-2024-45009 affects Linux kernel versions between 5.10.223-1 and 5.10.226-1 as well as versions up to 5.15.167.
What component of the Linux kernel does CVE-2024-45009 impact?
CVE-2024-45009 impacts the MultiPath TCP (MPTCP) implementation in the Linux kernel.
Is CVE-2024-45009 related to potential denial of service vulnerabilities?
CVE-2024-45009 may be related to denial of service vulnerabilities due to issues in handling MPTCP address acceptance.
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