{"id":"USN-8136-1","summary":"dovecot vulnerabilities","details":"It was discovered that Dovecot incorrectly handled invalid base64 SASL data.\nAn attacker could possibly use this issue to cause a denial of service. This\nissue only affected Ubuntu 25.10. (CVE-2025-59028)\n\nIt was discovered that Dovecot script decode2text.sh incorrectly handled zip\nfiles. An attacker could possibly use this issue to obtain sensitive\ninformation. (CVE-2025-59031)\n\nIt was discovered that Dovecot incorrectly handled certain AUTHENTICATE\nrequests. An attacker could possibly use this issue to cause a denial of\nservice. (CVE-2025-59032)\n\nIt was discovered that Dovecot incorrectly handled certain SQL based\nauthentication. An attacker could possibly use this issue to bypass\nauthentication. This issue only affected Ubuntu 25.10. (CVE-2026-24031)\n\nIt was discovered that Dovecot incorrectly handled certain LDAP based\nauthentication. An attacker could possibly use this issue to bypass\nrestrictions and allow probing of LDAP structure. This issue only affected\nUbuntu 25.10. (CVE-2026-27860)\n\nIt was discovered that Dovecot is vulnerable to replay attack under\ncertain conditions. An attacker could possibly use this issue to bypass\nauthentication. (CVE-2026-27855)\n\nIt was discovered that Dovecot is vulnerable to a timing attack under\ncertain conditions. An attacker could possibly use this issue to bypass\nauthentication. (CVE-2026-27856)\n\nIt was discovered that Dovecot incorrectly handled certain IMAP login\nrequests. An attacker could possibly use this issue to cause a denial of\nservice. (CVE-2026-27857)\n\nIt was discovered that Dovecot incorrectly handled certain specially\ncrafted messages. An attacker could possibly use this issue to cause a\ndenial of service. (CVE-2026-27858)\n\nIt was discovered that Dovecot incorrectly handled certain specially\ncrafted mail messages. An attacker could possibly use this issue to\ncause a denial of service. (CVE-2026-27859)\n\nIt was discovered that Dovecot incorrectly handles file paths. A attacker\ncould possibly use this issue to perform a path traversal and obtain or\nmodify arbitrary files. This issue only affected Ubuntu 22.04 LTS and\nUbuntu 24.04 LTS. (CVE-2026-0394)","modified":"2026-04-24T10:17:24.874769179Z","published":"2026-03-31T09:48:59Z","related":["UBUNTU-CVE-2025-59028","UBUNTU-CVE-2025-59031","UBUNTU-CVE-2025-59032","UBUNTU-CVE-2026-0394","UBUNTU-CVE-2026-24031","UBUNTU-CVE-2026-27855","UBUNTU-CVE-2026-27856","UBUNTU-CVE-2026-27857","UBUNTU-CVE-2026-27858","UBUNTU-CVE-2026-27859","UBUNTU-CVE-2026-27860"],"upstream":["CVE-2025-59028","CVE-2026-24031","CVE-2026-27860","UBUNTU-CVE-2025-59028","UBUNTU-CVE-2026-24031","UBUNTU-CVE-2026-27860"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8136-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-59028"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-24031"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-27860"}],"affected":[{"package":{"name":"dovecot","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/dovecot@1:2.3.16+dfsg1-3ubuntu2.7?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.3.16+dfsg1-3ubuntu2.7"}]}],"versions":["1:2.3.13+dfsg1-1ubuntu3","1:2.3.16+dfsg1-3ubuntu1","1:2.3.16+dfsg1-3ubuntu2","1:2.3.16+dfsg1-3ubuntu2.1","1:2.3.16+dfsg1-3ubuntu2.2","1:2.3.16+dfsg1-3ubuntu2.4","1:2.3.16+dfsg1-3ubuntu2.6"],"ecosystem_specific":{"binaries":[{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-auth-lua"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-core"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-gssapi"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-imapd"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-ldap"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-lmtpd"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-lucene"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-managesieved"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-mysql"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-pgsql"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-pop3d"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-sieve"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-solr"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-sqlite"},{"binary_version":"1:2.3.16+dfsg1-3ubuntu2.7","binary_name":"dovecot-submissiond"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8136-1.json"}},{"package":{"name":"dovecot","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/dovecot@1:2.3.21+dfsg1-2ubuntu6.3?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.3.21+dfsg1-2ubuntu6.3"}]}],"versions":["1:2.3.20+dfsg1-1ubuntu3","1:2.3.21+dfsg1-2ubuntu1","1:2.3.21+dfsg1-2ubuntu2","1:2.3.21+dfsg1-2ubuntu4","1:2.3.21+dfsg1-2ubuntu5","1:2.3.21+dfsg1-2ubuntu6","1:2.3.21+dfsg1-2ubuntu6.1","1:2.3.21+dfsg1-2ubuntu6.2"],"ecosystem_specific":{"binaries":[{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-auth-lua"},{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-core"},{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-gssapi"},{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-imapd"},{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-ldap"},{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-lmtpd"},{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-managesieved"},{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-mysql"},{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-pgsql"},{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-pop3d"},{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-sieve"},{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-solr"},{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-sqlite"},{"binary_version":"1:2.3.21+dfsg1-2ubuntu6.3","binary_name":"dovecot-submissiond"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[],"ecosystem":"Ubuntu:24.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8136-1.json"}},{"package":{"name":"dovecot","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/dovecot@1:2.4.1+dfsg1-5ubuntu4.1?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.4.1+dfsg1-5ubuntu4.1"}]}],"versions":["1:2.3.21.1+dfsg1-1ubuntu2","1:2.4.1+dfsg1-5ubuntu1","1:2.4.1+dfsg1-5ubuntu3","1:2.4.1+dfsg1-5ubuntu4"],"ecosystem_specific":{"binaries":[{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-auth-lua"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-core"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-flatcurve"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-gssapi"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-imapd"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-ldap"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-lmtpd"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-managesieved"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-mysql"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-pgsql"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-pop3d"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-sieve"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-solr"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-sqlite"},{"binary_version":"1:2.4.1+dfsg1-5ubuntu4.1","binary_name":"dovecot-submissiond"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2025-59028","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-24031","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-27860","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:25.10"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8136-1.json"}}],"schema_version":"1.7.5"}