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Public proof of concept

CVE-2021-47155

A public proof of concept exists; no exploitation attested.

  • Published2024-03-18
  • WeaknessCWE-284

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The Net::IPV4Addr module 0.10 for Perl does not properly consider extraneous zero characters in an IP address string, which (in some situations) allows attackers to bypass access control that is based on IP addresses.

Timeline

dates in UTC
  1. 2024-03-1805:15CVE publishedNVD

Versions per branch

CISA-ADP
Perl
BranchAffectedFixed in
0.10= 0.10no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libnetwork-ipv4addr-perlUbuntu:26.10all versions · no fixed version listed
  • libnetwork-ipv4addr-perlUbuntu:26.04:LTSall versions · no fixed version listed
  • libnetwork-ipv4addr-perlUbuntu:25.10all versions · no fixed version listed
  • libnetwork-ipv4addr-perlUbuntu:24.04:LTSall versions · no fixed version listed
  • libnetwork-ipv4addr-perlUbuntu:22.04:LTSall versions · no fixed version listed
  • libnetwork-ipv4addr-perlUbuntu:20.04:LTSall versions · no fixed version listed
  • libnetwork-ipv4addr-perlUbuntu:18.04:LTSall versions · no fixed version listed
  • libnetwork-ipv4addr-perlUbuntu:16.04:LTSall versions · no fixed version listed

3 more package ranges on OSV.dev

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
2024-03-18
Last Modified
2026-06-17
NVD status
Deferred
GitHub Advisory
GHSA-v6xp-w49h-9cmc

Frequently asked questions

What is CVE-2021-47155?

The Net::IPV4Addr module 0.10 for Perl does not properly consider extraneous zero characters in an IP address string, which (in some situations) allows attackers to bypass access control that is based on IP addresses.

Is CVE-2021-47155 actively exploited?

A proof-of-concept exploit exists for CVE-2021-47155, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2021-47155?

CVE-2021-47155 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

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Sources for this record