142 lines
5.9 KiB
JSON
142 lines
5.9 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-2026-64846",
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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": "2026-07-20T18:31:39.290Z",
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"datePublished": "2026-08-20T16:18:06.729Z",
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"dateUpdated": "2026-08-20T19:32:22.878Z"
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},
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"containers": {
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"cna": {
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"title": "Nix: Arbitrary file truncation outside the sandbox with recursive-nix experimental feature",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-61",
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"lang": "en",
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"description": "CWE-61: UNIX Symbolic Link (Symlink) Following",
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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-367",
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"lang": "en",
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"description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
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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": "HIGH",
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"attackVector": "LOCAL",
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"availabilityImpact": "NONE",
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"baseScore": 2.8,
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"baseSeverity": "LOW",
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"confidentialityImpact": "NONE",
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"integrityImpact": "LOW",
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"privilegesRequired": "LOW",
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"scope": "CHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N",
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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/NixOS/nix/security/advisories/GHSA-6h4g-g5j9-fm5f",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/NixOS/nix/security/advisories/GHSA-6h4g-g5j9-fm5f"
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},
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{
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"name": "https://github.com/NixOS/nix/pull/15401",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/NixOS/nix/pull/15401"
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},
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{
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"name": "https://github.com/NixOS/nix/commit/26679828f74ee6e82a4100904e6361f993ff5390",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/NixOS/nix/commit/26679828f74ee6e82a4100904e6361f993ff5390"
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}
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],
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"affected": [
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{
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"vendor": "NixOS",
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"product": "nix",
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"versions": [
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{
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"version": "< 2.35.0",
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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": "2026-08-20T16:18:06.729Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Nix is a package manager for Linux and other Unix systems. Prior to 2.35.0, a malicious derivation executed with the recursive-nix experimental feature can exploit a time-of-check/time-of-use race involving final symlink handling in the LocalStore restore path. The race can cause writeFile to follow a substituted final symlink when opening a path with O_TRUNC instead of enforcing FinalSymlink::DontFollow, allowing the Nix process or nix-daemon to create or truncate an empty file outside the build sandbox with the daemon user's permissions. The primitive does not provide arbitrary-content writes and requires winning the race. This issue is fixed in version 2.35.0."
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}
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],
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"source": {
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"advisory": "GHSA-6h4g-g5j9-fm5f",
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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": "2026-08-20T19:32:14.918442Z",
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"id": "CVE-2026-64846",
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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": "2026-08-20T19:32:22.878Z"
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}
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}
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]
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}
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} |