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.
References
Configurations
Configuration 1 (hide)
|
History
23 Oct 2024, 17:58
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-203 | |
| First Time |
Linux
Linux linux Kernel |
|
| References | () https://git.kernel.org/stable/c/662ec52260cc07b9ae53ecd3925183c29d34288b - Patch | |
| References | () https://git.kernel.org/stable/c/a7722921adb046e3836eb84372241f32584bdb07 - Patch | |
| References | () https://git.kernel.org/stable/c/8c2bd38b95f75f3d2a08c93e35303e26d480d24e - Patch | |
| References | () https://git.kernel.org/stable/c/483397b4ba280813e4a9c161a0a85172ddb43d19 - Patch | |
| References | () https://git.kernel.org/stable/c/997ba8889611891f91e8ad83583466aeab6239a3 - Patch | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
21 Oct 2024, 12:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-10-21 12:15
Updated : 2024-10-23 17:58
NVD link : CVE-2024-47678
Mitre link : CVE-2024-47678
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-203
Observable Discrepancy