{"vulnerability": "CVE-2021-25740", "sightings": [{"uuid": "ef6eda2b-d92c-4829-924c-956613999ad2", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-25740", "type": "seen", "source": "https://bsky.app/profile/kubernetes.dev/post/3m22v6zsv7i2o", "content": "", "creation_timestamp": "2025-09-30T15:56:04.775591Z"}, {"uuid": "6c69474c-d0f5-4e46-ac24-25957f725d67", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-25740", "type": "seen", "source": "https://bsky.app/profile/bluesky.awakari.com/post/3lzzajsf24423", "content": "", "creation_timestamp": "2025-09-30T00:13:36.976565Z"}, {"uuid": "0e7cf8c5-5e9d-4ac8-afb8-6f4ede3d0e65", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-25740", "type": "seen", "source": "https://gist.github.com/Roguito/e0e0d9d9a068f63e88a977bcb10d17f2", "content": "", "creation_timestamp": "2025-10-07T00:40:54.000000Z"}, {"uuid": "57b9ad2b-848e-455c-8809-93b03ef46cd8", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-25740", "type": "seen", "source": "https://t.me/k8security/344", "content": "\u041f\u043e\u0433\u043e\u0432\u043e\u0440\u0438\u043c \u0441\u0435\u0433\u043e\u0434\u043d\u044f \u043e \u0442\u0430\u043a\u0438\u0445 Kubernetes \u0440\u0435\u0441\u0443\u0440\u0441\u0430\u0445 \u043a\u0430\u043a Endpoint \u0438 EndpointSlice, \u0430 \u0442\u043e\u0447\u043d\u0435\u0435 \u043e \u0446\u0435\u043b\u044b\u0445 \u0434\u0432\u0443\u0445 \u043d\u043e\u0432\u044b\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u0445, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u0441 \u043d\u0438\u043c\u0438.\n\nCVE-2021-25737: Holes in EndpointSlice Validation Enable Host Network Hijack\n\u0423\u0440\u043e\u0432\u0435\u043d\u044c Low (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N)\n\n\u041a\u0440\u0430\u0442\u043a\u0430\u044f \u0441\u0443\u0442\u044c: \"user may be able to redirect pod traffic to private networks on a Node.\". \u041f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c, \u043a\u043e\u043d\u0435\u0447\u043d\u043e, \u0434\u043e\u043b\u0436\u0435\u043d \u0438\u043c\u0435\u0442\u044c \u043f\u0440\u0430\u0432\u0430 \u043d\u0430 \u0440\u0430\u0431\u043e\u0442\u0443 \u0441 \u0434\u0430\u043d\u043d\u044b\u043c \u0442\u0438\u043f\u043e\u043c \u0440\u0435\u0441\u0443\u0440\u0441\u0430. \u041f\u0440\u0438 \u044d\u0442\u043e\u043c \u043f\u043e\u0434\u043e\u0431\u043d\u043e\u0435 \u0434\u043b\u044f Endpoint \u0437\u0430\u043a\u0440\u044b\u043b\u0438, \u0430 \u043f\u0440\u043e EndpointSlice \u0437\u0430\u0431\u044b\u043b\u0438.\n\n\u041f\u043e\u043c\u0438\u043c\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f kube-apiserver \u0434\u043b\u044f \u043c\u0438\u0442\u0438\u0433\u0438\u0439\u0448\u0435\u043d\u0430/\u0437\u0430\u043a\u0440\u044b\u0442\u0438\u044f \u0434\u0430\u043d\u043d\u043e\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c policy engine, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u0440\u0435\u0434\u043e\u0442\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 endpoint \u0441 \u0430\u0434\u0440\u0435\u0441\u0430\u043c\u0438 \u0432 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d\u0430\u0445 127.0.0.0/8 \u0438 169.254.0.0/16. \n\n\nCVE-2021-25740: Endpoint & EndpointSlice permissions allow cross-Namespace forwarding\n\u0423\u0440\u043e\u0432\u0435\u043d\u044c Low (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N)\n\n\u041a\u0440\u0430\u0442\u043a\u0430\u044f \u0441\u0443\u0442\u044c: \"that could enable users to send network traffic to locations they would otherwise not have access to via a confused deputy attack.\"\n\n\u041f\u0440\u0438 \u044d\u0442\u043e\u043c \u043d\u0430 \u044d\u0442\u043e \u043f\u0430\u0442\u0447\u0430 \u043d\u0435\u0442 \u0438 \u043d\u0435 \u0431\u0443\u0434\u0435\u0442 \u0438 \u043c\u0438\u0442\u0438\u0433\u0435\u0439\u0448\u0435\u043d \u0437\u0430\u043a\u043b\u044e\u0447\u0430\u0435\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0434\u0430\u043d\u043d\u044b\u043c \u0440\u0435\u0441\u0443\u0440\u0441\u0430\u043c! (\u043a\u0430\u043a \u044d\u0442\u043e \u0437\u0430\u043a\u0440\u044b\u0442\u044c \u0432 \u0431\u0443\u0434\u0443\u0449\u0435\u043c \u0431\u0443\u0434\u0435\u0442 \u0432\u0435\u0441\u0442\u0438\u0441\u044c \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u043e\u0435 \u043e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0435 \u0432 \u0441\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0435) \u0410 \u0434\u0430 \u0438 \u0434\u0430\u043d\u043d\u043e\u043c\u0443 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043a\u0443 \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u044b \u0432\u0441\u0435 \u0432\u0435\u0440\u0441\u0438\u0438 Kubernetes. \u0414\u043b\u044f \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u044b\u0445 \u043a \u0434\u0430\u043d\u043d\u043e\u043c\u0443 \u0441\u0446\u0435\u043d\u0430\u0440\u0438\u044e Services - \u043d\u0443\u0436\u043d\u043e \u043d\u0430\u0439\u0442\u0438 \u0438\u0445 \u0432\u0441\u0435 \u0441 \u043f\u0443\u0441\u0442\u044b\u043c\u0438 selector.\n\n\u0422\u0430\u043a\u0436\u0435 \u0432 \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0438 CVE \u0433\u043e\u0432\u043e\u0440\u0438\u0442\u0441\u044f, \u0447\u0442\u043e \u043f\u043e\u0434\u043e\u0431\u043d\u0430\u044f \u0430\u0442\u0430\u043a\u0430 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e \u0438 \u0441 Ingress, \u043d\u043e \u0442\u0443\u0442 \u043d\u0443\u0436\u043d\u043e \u043f\u0440\u043e\u0432\u0435\u0440\u044f\u0442\u044c \u044d\u0442\u043e \u0434\u043b\u044f \u043a\u0430\u0436\u0434\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u043e \u2026", "creation_timestamp": "2021-07-15T07:58:12.000000Z"}, {"uuid": "ea39007c-7166-4000-bbc2-fe0528f76f2b", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-25740", "type": "seen", "source": "https://bsky.app/profile/kubernetes.io/post/3m23mgvbhnt2f", "content": "", "creation_timestamp": "2025-09-30T22:52:04.475039Z"}]}