152 lines
6.7 KiB
JSON
152 lines
6.7 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-2026-39855",
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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": "2026-04-09T15:58:38.559Z",
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"dateUpdated": "2026-04-09T19:22:16.659Z"
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},
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"containers": {
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"cna": {
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"title": "osslsigncode has an Integer Underflow in PE Page Hash Calculation Can Cause Out-of-Bounds Read",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-125",
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"lang": "en",
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"description": "CWE-125: Out-of-bounds Read",
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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-190",
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"lang": "en",
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"description": "CWE-190: Integer Overflow or Wraparound",
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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-191",
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"lang": "en",
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"description": "CWE-191: Integer Underflow (Wrap or Wraparound)",
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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": 5.5,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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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:N/I:N/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-76vv-x5rr-q3mr",
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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-76vv-x5rr-q3mr"
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},
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{
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"name": "https://github.com/mtrojnar/osslsigncode/commit/2a5409b7c4b6c6fad2b093531e8fea6cf08e1568",
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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/2a5409b7c4b6c6fad2b093531e8fea6cf08e1568"
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},
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{
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"name": "https://github.com/mtrojnar/osslsigncode/releases/tag/2.13",
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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/2.13"
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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": "< 2.13",
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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": "2026-04-09T16:01:51.626Z"
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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 2.13, an integer underflow vulnerability exists in osslsigncode version 2.12 and earlier in the PE page-hash computation code (pe_page_hash_calc()). When page hash processing is performed on a PE file, the function subtracts hdrsize from pagesize without first validating that pagesize >= hdrsize. If a malicious PE file sets SizeOfHeaders (hdrsize) larger than SectionAlignment (pagesize), the subtraction underflows and produces a very large unsigned length. The code allocates a zero-filled buffer of pagesize bytes and then attempts to hash pagesize - hdrsize bytes from that buffer. After the underflow, this results in an out-of-bounds read from the heap and can crash the process. The vulnerability can be triggered while signing a malicious PE file with page hashing enabled (-ph), or while verifying a malicious signed PE file that already contains page hashes. Verification of an already signed file does not require the verifier to pass -ph. This vulnerability is fixed in 2.13."
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}
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],
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"source": {
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"advisory": "GHSA-76vv-x5rr-q3mr",
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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": "2026-04-09T19:12:57.585841Z",
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"id": "CVE-2026-39855",
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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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"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": "2026-04-09T19:22:16.659Z"
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}
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}
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]
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}
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} |