CVE-2021-47155
The Net::IPV4Addr module 0.10 for Perl does not properly consider extraneous zero characters in...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2021-47155- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-284
- Updated
- 2026-11-02
EUVDEUVD-2021-33803
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.
- Record
EUVD-2021-33803- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-v6xp-w49h-9cmc
The Net::IPV4Addr module 0.10 for Perl does not properly consider extraneous zero characters in...
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.
- Record
GHSA-v6xp-w49h-9cmc- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-284
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2021-47155- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-284
- Updated
- 2026-11-02
OSVDEBIAN-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.
- Record
DEBIAN-CVE-2021-47155- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2021-47155- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
OSV No score
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.
- Record
CVE-2021-47155- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libnetwork-ipv4addr-perlDebian:12 |
All versions, plus listed versions 0.10.ds-4 |
None known |
libnetwork-ipv4addr-perlDebian:13 |
All versions, plus listed versions 0.10.ds-4 |
None known |
libnetwork-ipv4addr-perlDebian:14 |
All versions, plus listed versions 0.10.ds-4 |
None known |
libnetwork-ipv4addr-perlUbuntu:16.04:LTS |
All versions, plus listed versions 0.10.ds-2 |
None known |
libnetwork-ipv4addr-perlUbuntu:18.04:LTS |
All versions, plus listed versions 0.10.ds-2 |
None known |
libnetwork-ipv4addr-perlUbuntu:20.04:LTS |
All versions, plus listed versions 0.10.ds-3 |
None known |
libnetwork-ipv4addr-perlUbuntu:22.04:LTS |
All versions, plus listed versions 0.10.ds-3.1 |
None known |
libnetwork-ipv4addr-perlUbuntu:24.04:LTS |
All versions, plus listed versions 0.10.ds-4 |
None known |
libnetwork-ipv4addr-perlUbuntu:25.10 |
All versions, plus listed versions 0.10.ds-4 |
None known |
libnetwork-ipv4addr-perlUbuntu:26.10 |
All versions, plus listed versions 0.10.ds-4 |
None known |
libnetwork-ipv4addr-perlUbuntu:26.04:LTS |
All versions, plus listed versions 0.10.ds-4 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-47155 is a critical vulnerability (CVSS 9.1) in Perl, published March 18, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.51%, the 43rd percentile. No source names a fixed version.