icmp: change the order of rate limits (Linux Linux)

CVE-2024-47678
CRITICAL 9.4

En bref

Source
NVD
EPSS
EPSS 0.61 % · centile 49 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

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.

Faiblesses (CWE)

  • CWE-203 — Écart observable

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1CRITICAL 9.4CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:LLinux
CVSS 3.1CRITICAL 9.4CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:LNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 4cdf507d54525842dfd9f6313fdafba039084046 < 997ba8889611891f91e8ad83583466aeab6239a3 ; affected 4cdf507d54525842dfd9f6313fdafba039084046 < 662ec52260cc07b9ae53ecd3925183c29d34288b ; affected 4cdf507d54525842dfd9f6313fdafba039084046 < a7722921adb046e3836eb84372241f32584bdb07 ; affected 4cdf507d54525842dfd9f6313fdafba039084046 < 483397b4ba280813e4a9c161a0a85172ddb43d19 ; affected 4cdf507d54525842dfd9f6313fdafba039084046 < 8c2bd38b95f75f3d2a08c93e35303e26d480d24e
Linux · Linuxaffected 3.18 ; unaffected 0 < 3.18 ; unaffected 6.1.113 ≤ 6.1.* ; unaffected 6.6.54 ≤ 6.6.* ; unaffected 6.10.13 ≤ 6.10.* ; unaffected 6.11.2 ≤ 6.11.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD