Headline
CVE-2022-39280: Merge pull request #57 from pyupio/security/remove-intensive-regex · pyupio/dparse@8c99017
dparse is a parser for Python dependency files. dparse in versions before 0.5.2 contain a regular expression that is vulnerable to a Regular Expression Denial of Service. All the users parsing index server URLs with dparse are impacted by this vulnerability. A patch has been applied in version 0.5.2, all the users are advised to upgrade to 0.5.2 as soon as possible. Users unable to upgrade should avoid passing index server URLs in the source file to be parsed.
@@ -1,39 +1,4 @@ # -*- coding: utf-8 -*- from __future__ import absolute_import, print_function, unicode_literals
import re # see https://gist.github.com/dperini/729294 URL_REGEX = re.compile( # protocol identifier "(?:(?:https?|ftp)://)" # user:pass authentication "(?:\S+(?::\S*)?@)?" "(?:" # IP address exclusion # private & local networks "(?!(?:10|127)(?:\.\d{1,3}){3})" "(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})" "(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})" # IP address dotted notation octets # excludes loopback network 0.0.0.0 # excludes reserved space >= 224.0.0.0 # excludes network & broadcast addresses # (first & last IP address of each class) "(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])" "(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}" "(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))" “|” # host name "(?:(?:[a-z\u00a1-\uffff0-9]-?)*[a-z\u00a1-\uffff0-9]+)" # domain name "(?:\.(?:[a-z\u00a1-\uffff0-9]-?)*[a-z\u00a1-\uffff0-9]+)*" # TLD identifier "(?:\.(?:[a-z\u00a1-\uffff]{2,}))" ")" # port number "(?::\d{2,5})?" # resource path "(?:/\S*)?", re.UNICODE)
HASH_REGEX = r"–hash[=| ][\w]+:[\w]+" HASH_REGEX = r"–hash[=| ]\w+:\w+"