{"id":"UBUNTU-CVE-2021-29662","details":"The Data::Validate::IP module through 0.29 for Perl does not properly consider extraneous zero characters at the beginning of an IP address string, which (in some situations) allows attackers to bypass access control that is based on IP addresses.","modified":"2025-10-24T04:50:16Z","published":"2021-03-31T18:15:00Z","upstream":["CVE-2021-29662"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-29662"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-29662"}],"affected":[{"package":{"name":"libdata-validate-ip-perl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libdata-validate-ip-perl@0.25-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.24-1","0.25-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libdata-validate-ip-perl","binary_version":"0.25-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-29662.json"}},{"package":{"name":"libdata-validate-ip-perl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libdata-validate-ip-perl@0.27-1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.27-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libdata-validate-ip-perl","binary_version":"0.27-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-29662.json"}},{"package":{"name":"libdata-validate-ip-perl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libdata-validate-ip-perl@0.27-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.27-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.27-1","binary_name":"libdata-validate-ip-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-29662.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"negligible"}]}