214 lines
11 KiB
JSON
214 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-46813",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-09-11T15:12:18.283Z",
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"datePublished": "2024-09-27T12:35:55.786Z",
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"dateUpdated": "2026-10-30T12:19:22.335Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-30T12:19:22.335Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Check link_index before accessing dc->links[]\n\n[WHY & HOW]\ndc->links[] has max size of MAX_LINKS and NULL is return when trying to\naccess with out-of-bound index.\n\nThis fixes 3 OVERRUN and 1 RESOURCE_LEAK issues reported by Coverity."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable code is in the amdgpu DC display driver, reached during local driver probe and subsequently exercised through the local DRM device node (/dev/dri/card*) via atomic ioctl HDCP operations. There is no network-facing path to dc_get_link_at_index().\nAC:L - On an affected platform (DCN3.1-class hardware with 4 USB4 DPIA links plus a VBIOS reporting enough connector indices to push link_count past MAX_LINKS) the out-of-bounds access occurs deterministically on every driver load, and the subsequent use of the corrupted ddc.handle is reached reliably by enabling HDCP. No unpredictable memory-layout or timing condition must be won.\nPR:L - The out-of-bounds read and type-confused write occur during unprivileged driver initialization, and the corrupted HDCP DDC handle is subsequently dereferenced through the Content Protection connector property, which a local user with access to /dev/dri can set via the DRM atomic ioctl. No root or CAP_SYS_ADMIN is required.\nUI:N - The out-of-bounds indexing happens automatically at driver probe with no victim action, and the follow-on HDCP DDC path is driven entirely by the attacker's own DRM ioctls.\nS:U - The out-of-bounds access and the resulting corruption are confined to kernel memory within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The out-of-bounds read pulls adjacent struct dc members (link_srv, current_state, res_pool, clk_mgr) and treats them as a struct dc_link, so subsequent field reads and the HDCP DDC read_dpcd/read_i2c calls interpret arbitrary kernel memory as link state, and the resulting memory corruption can be leveraged for further information disclosure.\nI:H - The type-confused pointer is written through (link->priv = aconnector, link->psr_settings.* = ...), corrupting a live kernel object such as struct link_service or dc_state that contains function pointers, giving a memory-corruption primitive exploitable for control-flow hijacking.\nA:H - Dereferencing an out-of-bounds pointer read as a struct dc_link, and corrupting adjacent live kernel structures, reliably produces a kernel oops/panic and leaves the display subsystem in an inconsistent state."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/amd/display/dc/core/dc_link_exports.c"
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],
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"versions": [
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{
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"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
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"lessThan": "8ad4c2cf6c1af18f556e5c591fb313b2982ddf60",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
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"lessThan": "032c5407a608ac3b2a98bf4fbda27d12c20c5887",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
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"lessThan": "ac04759b4a002969cf0f1384f1b8bb2001cfa782",
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"status": "affected",
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},
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{
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"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
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"lessThan": "8aa2864044b9d13e95fe224f32e808afbf79ecdf",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/amd/display/dc/core/dc_link_exports.c"
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],
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"versions": [
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{
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"version": "4.15",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.15",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.87",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.10.9",
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"lessThanOrEqual": "6.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.11",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.15",
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"versionEndExcluding": "6.1.191"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/8ad4c2cf6c1af18f556e5c591fb313b2982ddf60"
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},
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{
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"url": "https://git.kernel.org/stable/c/032c5407a608ac3b2a98bf4fbda27d12c20c5887"
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},
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{
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"url": "https://git.kernel.org/stable/c/ac04759b4a002969cf0f1384f1b8bb2001cfa782"
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},
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{
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"url": "https://git.kernel.org/stable/c/8aa2864044b9d13e95fe224f32e808afbf79ecdf"
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}
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],
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"title": "drm/amd/display: Check link_index before accessing dc->links[]",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2024-09-29T14:18:36.575115Z",
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"id": "CVE-2024-46813",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-09-29T14:18:48.301Z"
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}
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}
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]
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}
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} |