fkie_cve-2024-30255
Vulnerability from fkie_nvd
Published
2024-04-04 20:15
Modified
2024-11-21 09:11
Severity ?
Summary
Envoy is a cloud-native, open source edge and service proxy. The HTTP/2 protocol stack in Envoy versions prior to 1.29.3, 1.28.2, 1.27.4, and 1.26.8 are vulnerable to CPU exhaustion due to flood of CONTINUATION frames. Envoy's HTTP/2 codec allows the client to send an unlimited number of CONTINUATION frames even after exceeding Envoy's header map limits. This allows an attacker to send a sequence of CONTINUATION frames without the END_HEADERS bit set causing CPU utilization, consuming approximately 1 core per 300Mbit/s of traffic and culminating in denial of service through CPU exhaustion. Users should upgrade to version 1.29.3, 1.28.2, 1.27.4, or 1.26.8 to mitigate the effects of the CONTINUATION flood. As a workaround, disable HTTP/2 protocol for downstream connections.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Envoy is a cloud-native, open source edge and service proxy. The HTTP/2 protocol stack in Envoy versions prior to 1.29.3, 1.28.2, 1.27.4, and 1.26.8 are vulnerable to CPU exhaustion due to flood of CONTINUATION frames. Envoy\u0027s HTTP/2 codec allows the client to send an unlimited number of CONTINUATION frames even after exceeding Envoy\u0027s header map limits. This allows an attacker to send a sequence of CONTINUATION frames without the END_HEADERS bit set causing CPU utilization, consuming approximately 1 core per 300Mbit/s of traffic and culminating in denial of service through CPU exhaustion. Users should upgrade to version 1.29.3, 1.28.2, 1.27.4, or 1.26.8 to mitigate the effects of the CONTINUATION flood. As a workaround, disable HTTP/2 protocol for downstream connections."
},
{
"lang": "es",
"value": "Envoy es un proxy de servicio y borde de c\u00f3digo abierto, nativo de la nube. La pila de protocolos HTTP/2 en las versiones de Envoy anteriores a 1.29.3, 1.28.2, 1.27.4 y 1.26.8 son vulnerables al agotamiento de la CPU debido a la inundaci\u00f3n de tramas de CONTINUACI\u00d3N. El c\u00f3dec HTTP/2 de Envoy permite al cliente enviar un n\u00famero ilimitado de tramas de CONTINUACI\u00d3N incluso despu\u00e9s de exceder los l\u00edmites del mapa de encabezado de Envoy. Esto permite a un atacante enviar una secuencia de tramas CONTINUATION sin que el bit END_HEADERS est\u00e9 configurado causando la utilizaci\u00f3n de la CPU, consumiendo aproximadamente 1 n\u00facleo por cada 300 Mbit/s de tr\u00e1fico y culminando en una denegaci\u00f3n de servicio por agotamiento de la CPU. Los usuarios deben actualizar a la versi\u00f3n 1.29.3, 1.28.2, 1.27.4 o 1.26.8 para mitigar los efectos de la inundaci\u00f3n de CONTINUACI\u00d3N. Como workaround, deshabilite el protocolo HTTP/2 para conexiones descendentes."
}
],
"id": "CVE-2024-30255",
"lastModified": "2024-11-21T09:11:33.297",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
},
"published": "2024-04-04T20:15:08.983",
"references": [
{
"source": "security-advisories@github.com",
"url": "http://www.openwall.com/lists/oss-security/2024/04/03/16"
},
{
"source": "security-advisories@github.com",
"url": "http://www.openwall.com/lists/oss-security/2024/04/05/3"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmm"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openwall.com/lists/oss-security/2024/04/03/16"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openwall.com/lists/oss-security/2024/04/05/3"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmm"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-390"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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