{"id":"ALPINE-CVE-2021-21240","details":"httplib2 is a comprehensive HTTP client library for Python. In httplib2 before version 0.19.0, a malicious server which responds with long series of \"\\xa0\" characters in the \"www-authenticate\" header may cause Denial of Service (CPU burn while parsing header) of the httplib2 client accessing said server. This is fixed in version 0.19.0 which contains a new implementation of auth headers parsing using the pyparsing library.","modified":"2026-11-03T06:32:38.123686030Z","published":"2021-02-08T20:15:12.197Z","upstream":["CVE-2021-21240"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2021-21240"}],"affected":[{"package":{"name":"py3-httplib2","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/py3-httplib2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21240.json"}},{"package":{"name":"py3-httplib2","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/py3-httplib2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21240.json"}},{"package":{"name":"py3-httplib2","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/py3-httplib2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21240.json"}},{"package":{"name":"py3-httplib2","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/py3-httplib2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21240.json"}},{"package":{"name":"py3-httplib2","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/py3-httplib2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21240.json"}},{"package":{"name":"py3-httplib2","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/py3-httplib2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21240.json"}},{"package":{"name":"py3-httplib2","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/py3-httplib2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21240.json"}},{"package":{"name":"py3-httplib2","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/py3-httplib2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21240.json"}},{"package":{"name":"py3-httplib2","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/py3-httplib2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21240.json"}},{"package":{"name":"py3-httplib2","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/py3-httplib2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21240.json"}},{"package":{"name":"py3-httplib2","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/py3-httplib2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21240.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}