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{"acknowledgement": "Red Hat would like to thank Jann Horn (Google Project Zero) for reporting this issue.", "bugzilla": {"description": "c-ares: ares_destroy() with pending ares_getaddrinfo() leads to Use-After-Free", "id": "1866838", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1866838"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-120->CWE-416", "details": ["A possible use-after-free and double-free in c-ares lib version 1.16.0 if ares_destroy() is called prior to ares_getaddrinfo() completing. This flaw possibly allows an attacker to crash the service that uses c-ares lib. The highest threat from this vulnerability is to this service availability."], "mitigation": {"lang": "en:us", "value": "If calling wait_ares(channel) before ares_destroy() in the service that uses c-ares, then this should prevent this bug."}, "name": "CVE-2020-14354", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "c-ares", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "c-ares", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "c-ares", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "c-ares", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "nodejs", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:3", "fix_state": "Not affected", "package_name": "rh-nodejs10-nodejs", "product_name": "Red Hat Software Collections"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:3", "fix_state": "Not affected", "package_name": "rh-nodejs12-nodejs", "product_name": "Red Hat Software Collections"}], "public_date": "2020-08-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-14354\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-14354\nhttps://c-ares.haxx.se/changelog.html\nhttps://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e\nhttps://packetstormsecurity.com/files/158755/GS20200804145053.txt"], "statement": "This flaw is rated as a having Moderate impact, because it can happen only during close of the service (or when handling ARES_ECONNREFUSED). The Red Hat Enterprise Linux not affected (all versions), because the version of c-ares being used is 1.13.0, and the bug introduced in 1.16.0 (and then fixed in 1.16.1).", "threat_severity": "Moderate", "upstream_fix": "c-ares 1.16.1"}