358 lines
18 KiB
JSON
358 lines
18 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-2019-25160",
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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": "2024-02-26T17:07:20.465Z",
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"datePublished": "2024-02-26T17:20:19.490Z",
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"dateUpdated": "2026-08-05T08:43:45.278Z"
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},
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"containers": {
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"cna": {
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:43:45.278Z"
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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\nnetlabel: fix out-of-bounds memory accesses\n\nThere are two array out-of-bounds memory accesses, one in\ncipso_v4_map_lvl_valid(), the other in netlbl_bitmap_walk(). Both\nerrors are embarassingly simple, and the fixes are straightforward.\n\nAs a FYI for anyone backporting this patch to kernels prior to v4.8,\nyou'll want to apply the netlbl_bitmap_walk() patch to\ncipso_v4_bitmap_walk() as netlbl_bitmap_walk() doesn't exist before\nLinux v4.8."
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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:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 9.1,
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"baseSeverity": "CRITICAL"
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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:N - Crafted IPv4 packets with CIPSO options reach the bug via ip_rcv_finish_core -> ip_rcv_options -> ip_options_compile -> cipso_v4_validate -> cipso_v4_map_lvl_valid/netlbl_bitmap_walk, with no local access required. This is a net/ stack path processing remote peer packet data.\nAC:L - With a CIPSO MAP_TRANS DOI configured (the labeled-networking deployment this subsystem targets), an attacker reliably triggers the OOB by setting an out-of-range level byte or category bitmap; DOI values are probeable via ICMP parameter-problem offsets. No race or other attacker-uncontrollable condition is required.\nPR:N - Incoming skbs take the CIPSO path in __ip_options_compile without CAP_NET_RAW or any authentication; the privilege check applies only when skb is NULL (setsockopt). A remote unauthenticated sender can trigger the vulnerable validation.\nUI:N - Exploitation requires only sending crafted IP packets to the host; no victim user action is needed.\nS:U - Impact is confined to the receiving kernel's NetLabel/CIPSO processing and memory; there is no VM escape, IOMMU bypass, or other cross-authority boundary crossing.\nC:H - cipso_v4_map_lvl_valid indexes an attacker-controlled u8 into the DOI level array without a size check, enabling a large kernel heap OOB read (up to ~1KB when cipso_size is small). Per guidance, unbounded OOB reads score Confidentiality High.\nI:N - Both defects are out-of-bounds reads with no write, UAF, or control-flow corruption primitive; later map_lvl_ntoh still bounds-checks before applying labels, so there is no integrity impact.\nA:H - The OOB reads can fault on unmapped pages and cause a kernel oops/panic, and a remote attacker can trigger them repeatedly for DoS against CIPSO-enabled hosts."
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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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"net/ipv4/cipso_ipv4.c",
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"net/netlabel/netlabel_kapi.c"
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],
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"programFiles": [
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"net/ipv4/cipso_ipv4.c",
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"net/netlabel/netlabel_kapi.c"
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],
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"versions": [
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{
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"version": "2.6.19",
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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": "2.6.19",
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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": "3.16.66",
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"lessThanOrEqual": "3.16.*",
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"status": "unaffected",
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"version": "5.0",
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