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Podatność CVE-2021-32778
Publikacja: 2021-08-24
Opis: |
Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions envoy??s procedure for resetting a HTTP/2 stream has O(N^2) complexity, leading to high CPU utilization when a large number of streams are reset. Deployments are susceptible to Denial of Service when Envoy is configured with high limit on H/2 concurrent streams. An attacker wishing to exploit this vulnerability would require a client opening and closing a large number of H/2 streams. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to reduce time complexity of resetting HTTP/2 streams. As a workaround users may limit the number of simultaneous HTTP/2 dreams for upstream and downstream peers to a low number, i.e. 100. |
Typ:
CWE-834 (Excessive Iteration)
CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)
Ogólna skala CVSS |
Znaczenie |
Łatwość wykorzystania |
5/10 |
2.9/10 |
10/10 |
Wymagany dostęp |
Złożoność ataku |
Autoryzacja |
Zdalny |
Niska |
Nie wymagana |
Wpływ na poufność |
Wpływ na integralność |
Wpływ na dostępność |
Brak |
Brak |
Częściowy |
Referencje: |
https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history
https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc
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