Email::Address module before 1.904 for Perl uses an inefficient regular expression, which allows remote attackers to cause a denial of service (CPU consumption) via vectors related to "backtracking into the phrase," a different vulnerability than CVE-2014-0477.

• https://github.com/rjbs/Email-Address/blob/master/Changes
• http://seclists.org/oss-sec/2014/q2/563

Inefficient regular expression, which allows remote attackers to cause a denial of service (CPU consumption) via an empty quoted string in an RFC 2822 address.

• https://metacpan.org/changes/distribution/Email-Address

The parse() method in the Email::Address module through 1.909 for Perl is vulnerable to Algorithmic complexity on specially prepared input, leading to Denial of Service. Prepared special input that caused this problem contained 30 form-field characters ("\f").

• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901873
• http://www.openwall.com/lists/oss-security/2018/06/19/3
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00012.html