{"id":"UBUNTU-CVE-2021-46853","details":"Alpine before 2.25 allows remote attackers to cause a denial of service (application crash) when LIST or LSUB is sent before STARTTLS.","modified":"2026-01-30T02:37:04.062383Z","published":"2022-11-03T06:15:00Z","related":["USN-7360-1"],"upstream":["CVE-2021-46853"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-46853"},{"type":"REPORT","url":"https://nostarttls.secvuln.info"},{"type":"REPORT","url":"https://bugs.gentoo.org/807613"},{"type":"REPORT","url":"https://nostarttls.secvuln.info/"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-46853"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7360-1"}],"affected":[{"package":{"name":"alpine","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/alpine@2.20+dfsg1-2ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20+dfsg1-2ubuntu0.1~esm1"}]}],"versions":["2.20+dfsg1-1","2.20+dfsg1-2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_version":"2.20+dfsg1-2ubuntu0.1~esm1","binary_name":"alpine"},{"binary_name":"alpine-pico","binary_version":"2.20+dfsg1-2ubuntu0.1~esm1"},{"binary_name":"pilot","binary_version":"2.20+dfsg1-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46853.json"}},{"package":{"name":"alpine","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/alpine@2.21+dfsg1-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.21+dfsg1-1ubuntu0.1~esm1"}]}],"versions":["2.20+dfsg1-7","2.21+dfsg1-1","2.21+dfsg1-1build1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"alpine","binary_version":"2.21+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"alpine-pico","binary_version":"2.21+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"pilot","binary_version":"2.21+dfsg1-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46853.json"}},{"package":{"name":"alpine","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/alpine@2.22+dfsg1-1ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.22+dfsg1-1ubuntu0.1~esm1"}]}],"versions":["2.21+dfsg1-1.1build1","2.22+dfsg1-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"alpine","binary_version":"2.22+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"alpine-pico","binary_version":"2.22+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"pilot","binary_version":"2.22+dfsg1-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46853.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}