DescriptionThe Net::Netmask module before 2.0000 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium
Debian Bugs986135

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libnet-netmask-perl (PTS)stretch1.9022-1vulnerable
bullseye, sid1.9104-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[buster] - libnet-netmask-perl <no-dsa> (Minor issue)
[stretch] - libnet-netmask-perl <no-dsa> (Minor issue)
Fixed by:
Improvements and add safe_new() method:
Remove warnings introduced in tests:

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