{"id":"UBUNTU-CVE-2021-35525","details":"PostSRSd before 1.11 allows a denial of service (subprocess hang) if Postfix sends certain long data fields such as multiple concatenated email addresses. NOTE: the PostSRSd maintainer acknowledges \"theoretically, this error should never occur ... I'm not sure if there's a reliable way to trigger this condition by an external attacker, but it is a security bug in PostSRSd nevertheless.\"","modified":"2026-05-20T16:05:04.677179516Z","published":"2021-06-28T18:15:00Z","upstream":["CVE-2021-35525"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-35525"},{"type":"REPORT","url":"https://bugs.gentoo.org/793674"},{"type":"REPORT","url":"https://github.com/roehling/postsrsd/commit/077be98d8c8a9847e4ae0c7dc09e7474cbe27db2"},{"type":"REPORT","url":"https://github.com/roehling/postsrsd/releases/tag/1.11"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-35525"}],"affected":[{"package":{"name":"postsrsd","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/postsrsd?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"postsrsd","binary_version":"1.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35525.json"}},{"package":{"name":"postsrsd","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/postsrsd?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4-1","1.4-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"postsrsd","binary_version":"1.4-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35525.json"}},{"package":{"name":"postsrsd","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/postsrsd?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5-2"],"ecosystem_specific":{"binaries":[{"binary_name":"postsrsd","binary_version":"1.5-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35525.json"}},{"package":{"name":"postsrsd","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/postsrsd?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10-2"],"ecosystem_specific":{"binaries":[{"binary_name":"postsrsd","binary_version":"1.10-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35525.json"}},{"package":{"name":"postsrsd","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/postsrsd?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10-2","1.10-2.1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"postsrsd","binary_version":"1.10-2.1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35525.json"}},{"package":{"name":"postsrsd","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/postsrsd?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10-2.2"],"ecosystem_specific":{"binaries":[{"binary_name":"postsrsd","binary_version":"1.10-2.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35525.json"}},{"package":{"name":"postsrsd","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/postsrsd?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10-2.2","2.0.11-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.11-1","binary_name":"postsrsd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35525.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:N/I:N/A:L"},{"type":"Ubuntu","score":"low"}]}