CVE-2024-47678: icmp: change the order of rate limits
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: icmp: change the order of rate limits ICMP messages are ratelimited : After the blamed commits, the two rate limiters are applied in this order: 1) host wide ratelimit (icmp_global_allow()) 2) Per destination ratelimit (inetpeer based) In order to avoid side-channels attacks, we need to apply the per destination check first. This patch makes the following change : 1) icmp_global_allow() checks if the host wide limit is reached. But credits are not yet consumed. This is deferred to 3) 2) The per destination limit is checked/updated. This might add a new node in inetpeer tree. 3) icmp_global_consume() consumes tokens if prior operations succeeded. This means that host wide ratelimit is still effective in keeping inetpeer tree small even under DDOS. As a bonus, I removed icmp_global.lock as the fast path can use a lock-free operation.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | >=3.18<6.1.113 | |
| Linux kernel | >=6.2<6.6.54 | |
| Linux kernel | >=6.7<6.10.13 | |
| Linux kernel | >=6.11<6.11.2 | |
| Linux Kernel | >=3.18<6.1.113 | |
| Linux Kernel | >=6.2<6.6.54 | |
| Linux Kernel | >=6.7<6.10.13 | |
| Linux Kernel | >=6.11<6.11.2 | |
| debian/linux | <=5.10.223-1<=5.10.234-1 | 6.1.129-1 6.1.135-1 6.12.25-1 6.12.27-1 |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/483397b4ba280813e4a9c161a0a85172ddb43d19
- https://git.kernel.org/stable/c/662ec52260cc07b9ae53ecd3925183c29d34288b
- https://git.kernel.org/stable/c/8c2bd38b95f75f3d2a08c93e35303e26d480d24e
- https://git.kernel.org/stable/c/997ba8889611891f91e8ad83583466aeab6239a3
- https://git.kernel.org/stable/c/a7722921adb046e3836eb84372241f32584bdb07
- https://launchpad.net/bugs/cve/CVE-2024-47678
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-47678
- https://nvd.nist.gov/vuln/detail/CVE-2024-47678
- https://security-tracker.debian.org/tracker/CVE-2024-47678
- https://ubuntu.com/security/CVE-2024-47678
- https://git.kernel.org/linus/8c2bd38b95f75f3d2a08c93e35303e26d480d24e
- https://lore.kernel.org/linux-cve-announce/2024102106-CVE-2024-47678-0b1b@gregkh/T
- https://access.redhat.com/errata/RHSA-2025:6966
- https://bugzilla.redhat.com/show_bug.cgi?id=2320212
Frequently Asked Questions
What is the severity of CVE-2024-47678?
The severity of CVE-2024-47678 varies depending on the specific configuration and usage context of the affected Linux kernel versions.
How do I fix CVE-2024-47678?
To fix CVE-2024-47678, upgrade the Linux kernel to a version that includes the resolution for this vulnerability.
Which versions of the Linux kernel are affected by CVE-2024-47678?
CVE-2024-47678 affects Linux kernel versions between 3.18 and 6.1.113, 6.2 to 6.6.54, 6.7 to 6.10.13, and 6.11 to 6.11.2.
What type of vulnerability is CVE-2024-47678?
CVE-2024-47678 is a kernel vulnerability related to the improper order of rate limiting for ICMP messages.
Is there a known exploit for CVE-2024-47678?
As of now, there are no publicly known exploits specifically targeting CVE-2024-47678.
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