{"id":"CVE-2021-29923","details":"Go before 1.17 does not properly consider extraneous zero characters at the beginning of an IP address octet, which (in some situations) allows attackers to bypass access control that is based on IP addresses, because of unexpected octal interpretation. This affects net.ParseIP and net.ParseCIDR.","aliases":["BIT-golang-2021-29923"],"modified":"2026-04-11T12:36:22.361505Z","published":"2021-08-07T17:15:07.067Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"fixed":"21.1.1.1.0"}],"source":"CPE_FIELD","cpe":"cpe:2.3:a:oracle:timesten_in-memory_database:*:*:*:*:*:*:*:*"},{"extracted_events":[{"last_affected":"36"}],"source":"CPE_FIELD","cpe":"cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*"}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4CHKSFMHZVOBCZSSVRE3UEYNKARTBMTM/"},{"type":"ADVISORY","url":"https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis"},{"type":"ADVISORY","url":"https://golang.org/pkg/net/#ParseCIDR"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202208-02"},{"type":"REPORT","url":"https://github.com/golang/go/issues/30999"},{"type":"REPORT","url":"https://github.com/golang/go/issues/43389"},{"type":"FIX","url":"https://go-review.googlesource.com/c/go/+/325829/"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujan2022.html"},{"type":"EVIDENCE","url":"https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-016.md"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/golang/go","events":[{"introduced":"0"},{"fixed":"ec5170397c724a8ae440b2bc529f857c86f0e6b1"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.17"}],"source":"CPE_FIELD","cpe":"cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*"}}],"versions":["go1.10beta1","go1.10beta2","go1.10rc1","go1.10rc2","go1.11beta1","go1.11beta2","go1.11beta3","go1.12beta1","go1.12beta2","go1.13beta1","go1.14beta1","go1.15beta1","go1.16beta1","go1.17beta1","go1.17rc1","go1.17rc2","go1.3beta1","go1.3beta2","go1.4beta1","go1.5beta1","go1.5beta2","go1.5beta3","go1.6beta1","go1.6beta2","go1.7beta1","go1.7beta2","go1.7rc1","go1.7rc2","go1.7rc3","go1.7rc4","go1.8beta1","go1.8beta2","go1.9beta1","go1.9beta2","release.r56","weekly","weekly.2009-11-06","weekly.2009-11-10","weekly.2009-11-10.1","weekly.2009-11-12","weekly.2009-11-17","weekly.2009-12-07","weekly.2009-12-09","weekly.2009-12-22","weekly.2010-01-05","weekly.2010-01-13","weekly.2010-01-27","weekly.2010-02-04","weekly.2010-02-17","weekly.2010-02-23","weekly.2010-03-04","weekly.2010-03-15","weekly.2010-03-22","weekly.2010-03-30","weekly.2010-04-13","weekly.2010-04-27","weekly.2010-05-04","weekly.2010-05-27","weekly.2010-06-09","weekly.2010-06-21","weekly.2010-07-01","weekly.2010-07-14","weekly.2010-07-29","weekly.2010-08-04","weekly.2010-08-11","weekly.2010-08-25","weekly.2010-09-06","weekly.2010-09-15","weekly.2010-09-22","weekly.2010-09-29","weekly.2010-10-13","weekly.2010-10-13.1","weekly.2010-10-20","weekly.2010-10-27","weekly.2010-11-02","weekly.2010-11-10","weekly.2010-11-23","weekly.2010-12-02","weekly.2010-12-08","weekly.2010-12-15","weekly.2010-12-15.1","weekly.2010-12-22","weekly.2011-01-06","weekly.2011-01-12","weekly.2011-01-19","weekly.2011-01-20","weekly.2011-02-01","weekly.2011-02-01.1","weekly.2011-02-15","weekly.2011-02-24","weekly.2011-03-07","weekly.2011-03-07.1","weekly.2011-03-15","weekly.2011-03-28","weekly.2011-04-04","weekly.2011-04-13","weekly.2011-04-27","weekly.2011-05-22","weekly.2011-06-02","weekly.2011-06-09","weekly.2011-06-16","weekly.2011-06-23","weekly.2011-07-07","weekly.2011-07-19","weekly.2011-07-29","weekly.2011-08-10","weekly.2011-08-17","weekly.2011-09-01","weekly.2011-09-07","weekly.2011-09-16","weekly.2011-09-21","weekly.2011-10-06","weekly.2011-10-18","weekly.2011-10-25","weekly.2011-10-26","weekly.2011-11-01","weekly.2011-11-02","weekly.2011-11-08","weekly.2011-11-09","weekly.2011-11-18","weekly.2011-12-01","weekly.2011-12-02","weekly.2011-12-06","weekly.2011-12-14","weekly.2011-12-22","weekly.2012-01-15","weekly.2012-01-20","weekly.2012-01-27","weekly.2012-02-07","weekly.2012-02-14","weekly.2012-02-22","weekly.2012-03-04","weekly.2012-03-13","weekly.2012-03-22","weekly.2012-03-27"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-29923.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:H/A:N"}]}