Information Exposure Affecting kernel-debug-core package, versions *
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGCORE-8287132
- published 23 Oct 2024
- disclosed 21 Oct 2024
Introduced: 21 Oct 2024
CVE-2024-47678 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:8
kernel-debug-core
.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-core
package and not the kernel-debug-core
package as distributed by RHEL
.
See How to fix?
for RHEL:8
relevant fixed versions and status.
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:
host wide ratelimit (icmp_global_allow())
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 :
icmp_global_allow() checks if the host wide limit is reached. But credits are not yet consumed. This is deferred to 3)
The per destination limit is checked/updated. This might add a new node in inetpeer tree.
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.
References
- https://access.redhat.com/security/cve/CVE-2024-47678
- 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