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-2024-42279",
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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": "2024-07-30T07:40:12.261Z",
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"datePublished": "2024-08-17T09:08:46.829Z",
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"dateUpdated": "2026-10-30T12:19:01.283Z"
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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": "2026-10-30T12:19:01.283Z"
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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\nspi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer\n\nWhile transmitting with rx_len == 0, the RX FIFO is not going to be\nemptied in the interrupt handler. A subsequent transfer could then\nread crap from the previous transfer out of the RX FIFO into the\nstart RX buffer. The core provides a register that will empty the RX and\nTX FIFOs, so do that before each transfer."
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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 `mchp_corespi_transfer_one()` path is entered from the SPI core, reachable locally through spidev ioctls (`SPI_IOC_MESSAGE`) or by driving any in-kernel SPI client; no network or physical access to the board is needed.\nAC:L - The attacker can reliably dirty the RX FIFO with back-to-back transfers (including transfers larger than the 32-byte FIFO that provoke `INT_RX_CHANNEL_OVERFLOW`, or aborted transfers), and the residue is sticky rather than probabilistic, so no condition outside the attacker's control is required.\nPR:L - Only ordinary local access to an SPI device node (commonly group-accessible on embedded platforms) or the ability to trigger an SPI client is needed; there is no capability check anywhere on the path from the ioctl to `transfer_one`.\nUI:N - The attacker issues the transfers themselves and the stale-FIFO condition persists on its own; no victim action is required.\nS:U - The impact stays within the kernel and the SPI controller managed by it; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Bytes clocked in during a previous transaction — from any device on the shared bus, including a TPM, secure element, or the boot/root SPI flash — are copied into the attacker's RX buffer, and the leak can be repeated indefinitely, so security-critical data transiting the bus can be siphoned across driver and process boundaries.\nI:H - Residue from the attacker's own transaction is prepended into the next client's `rx_buf`, and an attacker transacting with a readback-capable slave controls those bytes exactly, allowing chosen data to be injected into another driver's input — e.g. corrupting a secure-element/TPM response or data read from the root flash.\nA:H - The residue count never clears, so once the FIFO fills every subsequent transfer overflows and returns garbage, permanently breaking every device on the controller (rootfs SPI-NOR, watchdog, sensors) until reboot, with SPI core transfer timeouts and `dev_err` spam."
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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/spi/spi-microchip-core.c"
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],
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"versions": [
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{
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"version": "9ac8d17694b66d54b13e9718b25c14ca36dbebbd",
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"lessThan": "950375a0ba7d6c82ea5b5a44dd48a9e41fa45826",
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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": "9ac8d17694b66d54b13e9718b25c14ca36dbebbd",
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"lessThan": "3feda3677e8bbe833c3a62a4091377a08f015b80",
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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": "9ac8d17694b66d54b13e9718b25c14ca36dbebbd",
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"lessThan": "45e03d35229b680b79dfea1103a1f2f07d0b5d75",
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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": "9ac8d17694b66d54b13e9718b25c14ca36dbebbd",
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"lessThan": "9cf71eb0faef4bff01df4264841b8465382d7927",
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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/spi/spi-microchip-core.c"
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],
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"versions": [
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{
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"version": "6.0",
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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": "6.0",
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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": "6.6.44",
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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": "6.10.3",
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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": "6.0",
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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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"versionStartIncluding": "6.0",
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"versionEndExcluding": "6.6.44"
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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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"versionStartIncluding": "6.0",
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"versionEndExcluding": "6.10.3"
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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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"versionStartIncluding": "6.0",
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"versionEndExcluding": "6.11"
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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/950375a0ba7d6c82ea5b5a44dd48a9e41fa45826"
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},
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{
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"url": "https://git.kernel.org/stable/c/3feda3677e8bbe833c3a62a4091377a08f015b80"
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},
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{
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"url": "https://git.kernel.org/stable/c/45e03d35229b680b79dfea1103a1f2f07d0b5d75"
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},
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{
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"url": "https://git.kernel.org/stable/c/9cf71eb0faef4bff01df4264841b8465382d7927"
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}
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],
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"title": "spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer",
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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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"id": "CVE-2024-42279",
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"role": "CISA Coordinator",
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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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"version": "2.0.3",
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"timestamp": "2024-09-10T16:11:42.802690Z"
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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": "2024-09-12T17:33:31.191Z"
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}
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}
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]
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}
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} |