What’s Vulnerable › Vulnerabilities

CVE-2021-47154

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-03-18 · updated 2026-06-17

Description

The Net::CIDR::Lite module before 0.22 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.

References

• https://blog.urth.org/2021/03/29/security-issues-in-perl-ip-address-distros/
• https://github.com/stigtsp/Net-CIDR-Lite/commit/23b6ff0590dc279521863a502e890ef19a5a76fc
• https://lists.debian.org/debian-lts-announce/2024/03/msg00023.html
• https://metacpan.org/dist/Net-CIDR-Lite/changes
• https://metacpan.org/pod/Net::CIDR::Lite
• https://blog.urth.org/2021/03/29/security-issues-in-perl-ip-address-distros/
• https://github.com/stigtsp/Net-CIDR-Lite/commit/23b6ff0590dc279521863a502e890ef19a5a76fc
• https://lists.debian.org/debian-lts-announce/2024/03/msg00023.html
• https://metacpan.org/dist/Net-CIDR-Lite/changes
• https://metacpan.org/pod/Net::CIDR::Lite

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