{"id":"UBUNTU-CVE-2021-33833","details":"ConnMan (aka Connection Manager) 1.30 through 1.39 has a stack-based buffer overflow in uncompress in dnsproxy.c via NAME, RDATA, or RDLENGTH (for A or AAAA).","modified":"2026-04-22T14:47:12.550542Z","published":"2021-06-09T08:00:00Z","related":["USN-6236-1"],"upstream":["CVE-2021-33833"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-33833"},{"type":"REPORT","url":"https://seclists.org/oss-sec/2021/q2/196"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6236-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-33833"}],"affected":[{"package":{"name":"connman","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/connman@1.35-6ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.35-6ubuntu0.1~esm1"}]}],"versions":["1.35-1","1.35-2","1.35-6"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"connman","binary_version":"1.35-6ubuntu0.1~esm1"},{"binary_name":"connman-vpn","binary_version":"1.35-6ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33833.json"}},{"package":{"name":"connman","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/connman@1.36-2ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.36-2ubuntu0.1"}]}],"versions":["1.36-2build1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"connman","binary_version":"1.36-2ubuntu0.1"},{"binary_version":"1.36-2ubuntu0.1","binary_name":"connman-vpn"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33833.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}