411 lines
20 KiB
JSON
411 lines
20 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-2021-47347",
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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": "2024-05-21T14:28:16.981Z",
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"datePublished": "2024-05-21T14:35:52.947Z",
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"dateUpdated": "2026-08-05T08:47:22.692Z"
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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": "2026-08-05T08:47:22.692Z"
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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\nwl1251: Fix possible buffer overflow in wl1251_cmd_scan\n\nFunction wl1251_cmd_scan calls memcpy without checking the length.\nHarden by checking the length is within the maximum allowed size."
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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 overflow is reached only when a local process supplies an SSID via nl80211 NL80211_CMD_TRIGGER_SCAN or WEXT SIOCSIWSCAN into wl1251_op_hw_scan→wl1251_cmd_scan; the copied bytes are not taken from over-the-air frames, so this is Local rather than Adjacent.\nAC:L - Once an oversized ssid_len reaches wl1251_cmd_scan, the unbounded memcpy into ssid[32] is fully deterministic with no race or layout dependency; the driver performs no length check of its own, so attack complexity is Low.\nPR:L - NL80211_CMD_TRIGGER_SCAN uses GENL_UNS_ADMIN_PERM (CAP_NET_ADMIN in the wiphy netns), which per kernel CNA guidance is Low rather than High, and on typical wl1251 embedded/desktop deployments that capability is delegated to ordinary sessions via wpa_supplicant/NetworkManager.\nUI:N - The attacker issues the scan or connect-driven scan request themselves; no separate victim action such as opening a crafted file is required.\nS:U - Corruption is confined to the host kernel wl1251 command buffer and the same OS security authority; it is not a VM escape, IOMMU bypass, or other cross-boundary impact.\nC:H - An oversized ssid_len causes both an out-of-bounds write past ssid[32] and an out-of-bounds read from the source SSID buffer into adjacent kernel memory in the scan request, which per OOB/memory-corruption guidance is High confidentiality impact.\nI:H - The unchecked memcpy is an attacker-controlled out-of-bounds write past the 32-byte ssid field into adjacent cmd->channels[] (then submitted to firmware), and out-of-bounds writes are scored High integrity.\nA:H - Kernel memory corruption from the unbounded copy can oops/panic under hardened kernels, and corrupting the firmware scan command can wedge or crash the wl1251 path, so availability impact is High."
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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/net/wireless/ti/wl1251/cmd.c"
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],
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"versions": [
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{
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{
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"defaultStatus": "affected",
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"programFiles": [
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"drivers/net/wireless/ti/wl1251/cmd.c"
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],
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"versions": [
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{
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"version": "2.6.31",
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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": "2.6.31",
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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": "4.4.276",
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"lessThanOrEqual": "4.4.*",
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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": "4.9.276",
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"lessThanOrEqual": "4.9.*",
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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": "4.14.240",
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"lessThanOrEqual": "4.14.*",
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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": "4.19.198",
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"lessThanOrEqual": "4.19.*",
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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": "5.4.133",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.51",
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"lessThanOrEqual": "5.10.*",
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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": "5.12.18",
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"lessThanOrEqual": "5.12.*",
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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": "5.13.3",
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"lessThanOrEqual": "5.13.*",
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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": "5.14",
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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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"title": "wl1251: Fix possible buffer overflow in wl1251_cmd_scan",
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"content": {
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"timestamp": "2024-11-13T22:00:32.437065Z",
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