CVE-2023-7340

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{"affected": [{"configurations": [{"platform": ["linux"], "status": "affected", "versions": {"scheme": "semver", "value": "3.5.0"}}, {"platform": ["linux"], "status": "affected", "versions": {"scheme": "semver", "value": "4.3.10"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Wazuh", "source": "cna", "vendor": "Wazuh"}, "product": "wazuh", "vendor": "wazuh"}], "analysis": {"en": {"generated_at": "2026-03-31T19:28:41.109228+00:00", "value": {"mitigation_remediation": ["Upgrade Wazuh to the latest release that resolves CVE\u20112023\u20117340 (for example, version 4.3.11 or later).", "If an upgrade is temporarily infeasible, restrict network access to the authd service by firewalling or disabling unused agent\u2011connection interfaces until the patch is applied.", "Monitor authd logs for abrupt process restarts or out\u2011of\u2011memory kills that could indicate exploitation attempts.", "Validate service stability after any changes by testing authentication flows to ensure no denial of service incidents occur."], "summary": {"action": "Patch ASAP", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The affected product is Wazuh, a security monitoring and IDS platform. The vulnerability exists in the authentication daemon (authd) of Wazuh versions 4.3.10 and earlier, as indicated by the associated CPE entries. Administrators should confirm whether their deployment uses those affected releases.\n\n", "description_and_impact": "Wazuh authd contains a heap-buffer overflow that allows attackers to corrupt memory and produce malformed heap data. This vulnerability gives adversaries the ability to trigger a denial-of-service condition, terminating the authentication daemon and causing a temporary loss of availability.\n\n", "risk_and_exploitability": "The CVSS score of 5.3 indicates moderate severity, while the EPSS score of less than 1% suggests a low probability of exploitation in the wild. The vulnerability is not listed in the CISA KEV catalog. Attackers would need to send specially crafted input to the authd service, likely over the network interface that agents use to authenticate. Given that the issue leads only to service crashes and not privilege escalation, the overall risk is limited to short\u2011lived denial of service."}}}}, "created": "2026-03-27T20:28:15.013101+00:00", "updated": "2026-03-31T20:01:07.910890+00:00", "vendors": ["wazuh", "wazuh$PRODUCT$wazuh"]}