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CVE-2021-4456 Net::CIDR versions before 0.24 for Perl mishandle leading zeros in IP CIDR addresses, which may have unspecified impact

🗓️ 27 Feb 2026 00:16:36Reported by CPANSecType 
cvelist
 cvelist
🔗 www.cve.org👁 16 Views

CVE-2021-4456: Net::CIDR before 0.24 mishandles CIDR leading zeros, may bypass access controls; validate with cidrvalidate.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2021-4456
27 Feb 202600:16
attackerkb
CNNVD
MetaCPAN Net::CIDR::Set 安全漏洞
27 Feb 202600:00
cnnvd
CVE
CVE-2021-4456
27 Feb 202600:16
cve
Debian CVE
CVE-2021-4456
27 Feb 202600:16
debiancve
EUVD
EUVD-2021-34770
27 Feb 202603:30
euvd
Fedora
[SECURITY] Fedora 42 Update: perl-Net-CIDR-0.27-1.fc42
10 Mar 202601:10
fedora
Tenable Nessus
Fedora 42 : perl-Net-CIDR (2026-baf8782c7a)
10 Mar 202600:00
nessus
Tenable Nessus
Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : Net-CIDR vulnerability (USN-8110-1)
20 Mar 202600:00
nessus
Tenable Nessus
Linux Distros Unpatched Vulnerability : CVE-2021-4456
2 Mar 202600:00
nessus
NVD
CVE-2021-4456
27 Feb 202601:16
nvd
Rows per page
[
  {
    "collectionURL": "https://cpan.org/modules",
    "defaultStatus": "unaffected",
    "packageName": "Net-CIDR",
    "product": "Net::CIDR",
    "programRoutines": [
      {
        "name": "addr2cidr"
      },
      {
        "name": "cidrlookup"
      }
    ],
    "repo": "https://github.com/svarshavchik/Net-CIDR",
    "vendor": "MRSAM",
    "versions": [
      {
        "lessThan": "0.24",
        "status": "affected",
        "version": "0",
        "versionType": "custom"
      }
    ]
  }
]

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