CVE-2024-47678

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This is deferred to 3)\n\n2) The per destination limit is checked/updated.\n This might add a new node in inetpeer tree.\n\n3) icmp_global_consume() consumes tokens if prior operations succeeded.\n\nThis means that host wide ratelimit is still effective\nin keeping inetpeer tree small even under DDOS.\n\nAs a bonus, I removed icmp_global.lock as the fast path\ncan use a lock-free operation."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L", "baseScore": 9.4, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable code is the ICMP output rate limiter in the IPv4/IPv6 stack, reached purely by processing received IP packets (e.g. a UDP datagram to a closed port via `__udp4_lib_rcv()` \u2192 `icmp_send()`), and the side channel is measured by an off-path host over the Internet. No local or adjacent access is required.\nAC:L - The attacker fully controls both sides: they generate the packets that drain the global bucket and separately probe its residual state from their own address, repeating at will to average out the `get_random_u32_below(3)` noise, and they can induce the victim resolver's in-flight query themselves rather than waiting for one. No condition of the target's memory layout or configuration that the attacker cannot influence is required \u2014 the ordering flaw is deterministic and present in default configurations.\nPR:N - No credentials, sockets, or capabilities are involved anywhere on the path \u2014 ICMP error generation happens for any unsolicited packet before any authentication, from any remote host.\nUI:N - The ICMP replies and the rate-limiter accounting occur entirely in kernel softirq context on packet receipt; no action by any local user or administrator is needed.\nS:U - The leaked state and the resulting impact remain within the security authority of the affected host's network stack; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - The shared global counter leaks whether and how many ICMP-eliciting packets the host processed for arbitrary third-party destinations, which recovers the secret ephemeral UDP source port of in-flight transactions (the SAD DNS primitive); that defeats UDP source-port randomization and exposes the confidentiality of DNS resolution and everything subsequently redirected by it.\nI:H - Recovering the source port lets an off-path attacker forge and win the race against the legitimate response, poisoning the resolver cache and arbitrarily redirecting the victim's traffic \u2014 full compromise of the integrity of the data the host relies on, consistent with the same attack class scored I:H previously.\nA:L - Because credits are consumed before the per-peer check, a single spoofed source address sending ~50 pps to closed ports exhausts the entire host-wide ICMP budget, suppressing legitimate ICMP error signalling (port unreachable, time exceeded) to every other peer and degrading network diagnostics and fast connection-failure signalling; there is no crash, so the impact is degradation rather than total loss."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/ip.h", "net/ipv4/icmp.c", "net/ipv6/icmp.c"], "versions": [{"version": "4cdf507d54525842dfd9f6313fdafba039084046", "lessThan": "997ba8889611891f91e8ad83583466aeab6239a3", "status": "affected", "versionType": "git"}, {"version": "4cdf507d54525842dfd9f6313fdafba039084046", "lessThan": "662ec52260cc07b9ae53ecd3925183c29d34288b", "status": "affected", "versionType": "git"}, {"version": "4cdf507d54525842dfd9f6313fdafba039084046", "lessThan": "a7722921adb046e3836eb84372241f32584bdb07", "status": "affected", "versionType": "git"}, {"version": "4cdf507d54525842dfd9f6313fdafba039084046", "lessThan": "483397b4ba280813e4a9c161a0a85172ddb43d19", "status": "affected", "versionType": "git"}, {"version": "4cdf507d54525842dfd9f6313fdafba039084046", "lessThan": "8c2bd38b95f75f3d2a08c93e35303e26d480d24e", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/ip.h", "net/ipv4/icmp.c", "net/ipv6/icmp.c"], "versions": [{"version": "3.18", "status": "affected"}, {"version": "0", "lessThan": "3.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.113", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.54", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.10.13", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11.2", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.1.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.6.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.10.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.11.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.12"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/997ba8889611891f91e8ad83583466aeab6239a3"}, {"url": "https://git.kernel.org/stable/c/662ec52260cc07b9ae53ecd3925183c29d34288b"}, {"url": "https://git.kernel.org/stable/c/a7722921adb046e3836eb84372241f32584bdb07"}, {"url": "https://git.kernel.org/stable/c/483397b4ba280813e4a9c161a0a85172ddb43d19"}, {"url": "https://git.kernel.org/stable/c/8c2bd38b95f75f3d2a08c93e35303e26d480d24e"}], "title": "icmp: change the order of rate limits", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-47678", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-10-21T13:07:41.965400Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-21T13:14:17.106Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:20:43.545Z"}}]}}

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This is deferred to 3)\n\n2) The per destination limit is checked/updated.\n This might add a new node in inetpeer tree.\n\n3) icmp_global_consume() consumes tokens if prior operations succeeded.\n\nThis means that host wide ratelimit is still effective\nin keeping inetpeer tree small even under DDOS.\n\nAs a bonus, I removed icmp_global.lock as the fast path\ncan use a lock-free operation."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: icmp: cambia el orden de los l\u00edmites de velocidad Los mensajes ICMP est\u00e1n limitados por velocidad: despu\u00e9s de las confirmaciones culpables, se aplican los dos limitadores de velocidad en este orden: 1) l\u00edmite de velocidad de todo el host (icmp_global_allow()) 2) l\u00edmite de velocidad por destino (basado en inetpeer) Para evitar ataques de canales secundarios, primero debemos aplicar la comprobaci\u00f3n por destino. Este parche realiza el siguiente cambio: 1) icmp_global_allow() comprueba si se ha alcanzado el l\u00edmite de todo el host. Pero a\u00fan no se han consumido los cr\u00e9ditos. Esto se pospone a 3) 2) Se comprueba/actualiza el l\u00edmite por destino. Esto podr\u00eda agregar un nuevo nodo en el \u00e1rbol inetpeer. 3) icmp_global_consume() consume tokens si las operaciones anteriores tuvieron \u00e9xito. Esto significa que el l\u00edmite de velocidad de todo el host sigue siendo eficaz para mantener peque\u00f1o el \u00e1rbol inetpeer incluso bajo DDOS. Como beneficio adicional, elimin\u00e9 icmp_global.lock ya que la ruta r\u00e1pida puede usar una operaci\u00f3n sin bloqueo."}], "id": "CVE-2024-47678", "lastModified": "2026-08-04T11:20:39.113", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 9.4, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.5, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-47678", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-10-21T13:07:41.965400Z", "version": "2.0.3"}}]}, "published": "2024-10-21T12:15:04.837", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/483397b4ba280813e4a9c161a0a85172ddb43d19"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/662ec52260cc07b9ae53ecd3925183c29d34288b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8c2bd38b95f75f3d2a08c93e35303e26d480d24e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/997ba8889611891f91e8ad83583466aeab6239a3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a7722921adb046e3836eb84372241f32584bdb07"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-203"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2025:6966", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:6966", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}], "bugzilla": {"description": "kernel: icmp: change the order of rate limits", "id": "2320212", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320212"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "status": "verified"}, "cwe": "CWE-203", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nicmp: change the order of rate limits\nICMP messages are ratelimited :\nAfter the blamed commits, the two rate limiters are applied in this order:\n1) host wide ratelimit (icmp_global_allow())\n2) Per destination ratelimit (inetpeer based)\nIn order to avoid side-channels attacks, we need to apply\nthe per destination check first.\nThis patch makes the following change :\n1) icmp_global_allow() checks if the host wide limit is reached.\nBut credits are not yet consumed. This is deferred to 3)\n2) The per destination limit is checked/updated.\nThis might add a new node in inetpeer tree.\n3) icmp_global_consume() consumes tokens if prior operations succeeded.\nThis means that host wide ratelimit is still effective\nin keeping inetpeer tree small even under DDOS.\nAs a bonus, I removed icmp_global.lock as the fast path\ncan use a lock-free operation.", "A flaw was found in the Linux kernel related to the order of rate limits for ICMP messages. The sequence in which rate limiters are applied potentially allows a side-channel attack, resulting in information disclosure."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2024-47678", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-47678\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-47678\nhttps://lore.kernel.org/linux-cve-announce/2024102106-CVE-2024-47678-0b1b@gregkh/T"], "threat_severity": "Moderate"}

{}