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{"acknowledgement": "Red Hat would like to thank the Dovecot project for reporting this issue.", "bugzilla": {"description": "dovecot: Dovecot DoS when passdb dict was used for authentication", "id": "1438676", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1438676"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.7", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-20", "details": ["Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang."], "name": "CVE-2017-2669", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "dovecot", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "dovecot", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "dovecot", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2017-04-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-2669\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-2669"], "statement": "Versions of dovecot shipped in Red Hat Enterprise Linux 5, 6 and 7 are not affected by this vulnerability.", "threat_severity": "Low", "upstream_fix": "dovecot 2.2.29"}