142 lines
6.1 KiB
JSON
142 lines
6.1 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-2026-39853",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-04-07T19:13:20.378Z",
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"datePublished": "2026-04-09T15:50:26.548Z",
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"dateUpdated": "2026-04-09T16:15:19.583Z"
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},
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"containers": {
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"cna": {
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"title": "osslsigncode has a Stack Buffer Overflow via Unbounded Digest Copy During Signature Verification",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-121",
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"lang": "en",
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"description": "CWE-121: Stack-based Buffer Overflow",
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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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"descriptions": [
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{
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"cweId": "CWE-787",
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"lang": "en",
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"description": "CWE-787: Out-of-bounds Write",
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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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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "LOW",
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"attackVector": "LOCAL",
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"availabilityImpact": "HIGH",
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"baseScore": 7.8,
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"baseSeverity": "HIGH",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "REQUIRED",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
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"version": "3.1"
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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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"name": "https://github.com/mtrojnar/osslsigncode/security/advisories/GHSA-hx87-8754-xvh4",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/mtrojnar/osslsigncode/security/advisories/GHSA-hx87-8754-xvh4"
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},
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{
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"name": "https://github.com/mtrojnar/osslsigncode/commit/cbee1e723c5a8547302bd841ad9943ed8144db68",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/mtrojnar/osslsigncode/commit/cbee1e723c5a8547302bd841ad9943ed8144db68"
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},
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{
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"name": "https://github.com/mtrojnar/osslsigncode/releases/tag/2.12",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/mtrojnar/osslsigncode/releases/tag/2.12"
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}
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],
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"affected": [
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{
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"vendor": "mtrojnar",
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"product": "osslsigncode",
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"versions": [
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{
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"version": "< 2.12",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-04-09T15:50:26.548Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "osslsigncode is a tool that implements Authenticode signing and timestamping. Prior to 2.12, A stack buffer overflow vulnerability exists in osslsigncode in several signature verification paths. During verification of a PKCS#7 signature, the code copies the digest value from a parsed SpcIndirectDataContent structure into a fixed-size stack buffer (mdbuf[EVP_MAX_MD_SIZE], 64 bytes) without validating that the source length fits within the destination buffer. This pattern is present in the verification handlers for PE, MSI, CAB, and script files. An attacker can craft a malicious signed file with an oversized digest field in SpcIndirectDataContent. When a user verifies such a file with osslsigncode verify, the unbounded memcpy can overflow the stack buffer and corrupt adjacent stack state. This vulnerability is fixed in 2.12."
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}
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],
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"source": {
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"advisory": "GHSA-hx87-8754-xvh4",
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"discovery": "UNKNOWN"
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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": "2026-04-09T16:13:50.325421Z",
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"id": "CVE-2026-39853",
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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": "total"
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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": "2026-04-09T16:15:19.583Z"
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}
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}
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]
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}
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} |