182 lines
7.8 KiB
JSON
182 lines
7.8 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-2026-62381",
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"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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"state": "PUBLISHED",
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"assignerShortName": "VulnCheck",
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"dateReserved": "2026-07-13T22:40:54.412Z",
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"datePublished": "2026-08-22T12:26:44.558Z",
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"dateUpdated": "2026-08-24T19:50:50.874Z"
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},
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"datePublic": "2026-08-07T00:00:00.000Z",
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"title": "luci-lib-px5g 2040-bit Certificate Signing Heap Buffer Overflow",
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"descriptions": [
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{
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"lang": "en",
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"value": "luci-lib-px5g (LuCI) contains a heap-based buffer overflow in the native ASN.1 encoding routine asn1_add_obj (x509write.c) when signing a certificate with a 2040-bit RSA key. For a 255-byte signature, the BIT STRING allocation is computed from the DER length encoding of 255 bytes, but the payload written after prepending the unused-bits byte is 256 bytes, requiring one additional DER length octet. As a result the allocation is 259 bytes while the tag, length, unused-bits byte, and signature require 260 bytes, and the final memcpy writes one byte beyond the heap buffer. The overflow is reachable through the exported Lua interface via create_selfsigned(); whether it is remotely exploitable depends on the embedding application. The vulnerable code is present on the openwrt-18.06 through openwrt-25.12 release branches and is absent from master, where the luci-lib-px5g package has been removed rather than patched."
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"description": "Heap-based Buffer Overflow",
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"cweId": "CWE-122",
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"type": "CWE"
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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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"vendor": "openwrt",
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"product": "luci",
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"defaultStatus": "unaffected",
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"packageName": "luci-lib-px5g",
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"collectionURL": "https://github.com/openwrt/luci",
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"versions": [
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{
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"version": "0",
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"lessThanOrEqual": "42d72f79cd8f057f241595abc761b39dab2d9f07",
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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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{
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"format": "CVSS",
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"cvssV4_0": {
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"version": "4.0",
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"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N",
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"attackVector": "LOCAL",
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"attackComplexity": "LOW",
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"attackRequirements": "NONE",
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"privilegesRequired": "LOW",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "LOW",
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"vulnIntegrityImpact": "LOW",
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"vulnAvailabilityImpact": "HIGH",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"attackVector": "LOCAL",
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"attackComplexity": "LOW",
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"privilegesRequired": "LOW",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "LOW",
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"integrityImpact": "LOW",
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"availabilityImpact": "HIGH",
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"baseScore": 6.6,
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],
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"references": [
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{
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"url": "https://github.com/openwrt/luci/security/advisories/GHSA-jgc3-4q3p-g6xh",
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"tags": [
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"vendor-advisory"
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],
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"name": "GitHub Security Advisory (GHSA-jgc3-4q3p-g6xh)"
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},
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{
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"name": "VulnCheck Advisory: luci-lib-px5g 2040-bit Certificate Signing Heap Buffer Overflow",
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"tags": [
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"third-party-advisory"
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],
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"url": "https://www.vulncheck.com/advisories/luci-lib-px5g-2040-bit-certificate-signing-heap-buffer-overflow"
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "cla7aye15I4nd",
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"type": "reporter"
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}
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],
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"x_generator": {
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"engine": "vulncheck-endgame"
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"adp": [
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"references": [
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{
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"url": "https://github.com/openwrt/luci/security/advisories/GHSA-jgc3-4q3p-g6xh",
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"tags": [
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"exploit"
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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": "2026-08-24T19:50:25.578742Z",
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"id": "CVE-2026-62381",
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"options": [
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{
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"Exploitation": "poc"
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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": "2026-08-24T19:50:50.874Z"
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}
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} |