CVE-2026-43619

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Atacantes con acceso al sistema de archivos local pueden explotar la ventana de tiempo entre la resoluci\u00f3n de la ruta y la ejecuci\u00f3n de la llamada al sistema intercambiando symlinks para aplicar permisos, propiedad, marcas de tiempo o nombres de archivo proporcionados por el remitente a archivos arbitrarios fuera del l\u00edmite del m\u00f3dulo previsto en demonios rsync configurados con 'use chroot = no'."}], "id": "CVE-2026-43619", "lastModified": "2026-07-24T09:10:00.153", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.2, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43619", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-20T13:09:05.654709Z", "version": "2.0.3"}}]}, "published": "2026-05-20T02:16:36.577", "references": [{"source": "disclosure@vulncheck.com", "tags": ["Release Notes"], "url": "https://github.com/RsyncProject/rsync/releases/tag/v3.4.3"}, {"source": "disclosure@vulncheck.com", "tags": ["Vendor Advisory"], "url": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-4h9m-w5ff-j735"}, {"source": "disclosure@vulncheck.com", "tags": ["Third Party Advisory"], "url": "https://www.vulncheck.com/advisories/rsync-symlink-race-condition-via-path-based-syscalls"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-59"}, {"lang": "en", "value": "CWE-367"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{"bugzilla": {"description": "rsync: rsync: Symlink race vulnerability allows unauthorized file operations", "id": "2469058", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2469058"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L", "status": "draft"}, "cwe": "CWE-59", "details": ["A flaw was found in rsync. A local attacker with filesystem access on the daemon host can exploit a symlink race vulnerability (CWE-367 Time-of-check to time-of-use) in rsync daemons configured with 'use chroot = no'. This allows the attacker to redirect path-based system calls, such as chmod, lchown, or unlink, outside the intended module. This could lead to unauthorized file operations or other security bypasses."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, ensure that the `rsync` daemon is configured with `use chroot = yes`. This can be achieved by editing the `rsyncd.conf` file, typically located at `/etc/rsyncd.conf`, and setting `use chroot = yes` within the relevant module configuration. After modifying the configuration, the `rsync` service must be restarted for the changes to take effect. This may temporarily interrupt active `rsync` operations."}, "name": "CVE-2026-43619", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "rsync", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "rsync", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "rsync", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "rsync", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "rsync", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-05-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43619\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43619"], "statement": "Moderate: A symlink race vulnerability affects rsync daemons when configured with `use chroot = no`, allowing a local attacker with filesystem access to perform unauthorized file operations outside the intended module. This risk is present only when the non-default `use chroot = no` setting is active.", "threat_severity": "Moderate"}

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