CVE-2024-47678

MEDIUM EPSS 14.9%
Published Oct 21, 20241y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
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Published Oct 21, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
14.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-203

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥3.18  –  <6.1.113
linuxlinux_kernel*≥6.2  –  <6.6.54
linuxlinux_kernel*≥6.7  –  <6.10.13
linuxlinux_kernel*≥6.11  –  <6.11.2

References 6

  • git.kernel.org https://git.kernel.org/stable/c/483397b4ba280813e4a9c161a0a85172ddb43d19
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/662ec52260cc07b9ae53ecd3925183c29d34288b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8c2bd38b95f75f3d2a08c93e35303e26d480d24e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/997ba8889611891f91e8ad83583466aeab6239a3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a7722921adb046e3836eb84372241f32584bdb07
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/483397b4ba280813e4a9c161a0a85172ddb43d19
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/662ec52260cc07b9ae53ecd3925183c29d34288b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8c2bd38b95f75f3d2a08c93e35303e26d480d24e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/997ba8889611891f91e8ad83583466aeab6239a3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a7722921adb046e3836eb84372241f32584bdb07
    Patch