CVE-2021-29662
The Data::Validate::IP module through 0.29 for Perl does not properly consider extraneous zero...
The Data::Validate::IP module through 0.29 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.
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
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
The Data::Validate::IP module through 0.29 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.
- Record
CVE-2021-29662- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-704
- Updated
- 2026-11-02
CVE List No score
The Data::Validate::IP module through 0.29 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.
- Record
CVE-2021-29662- Updated
- 2026-11-02
EUVDEUVD-2021-16136 No score
The Data::Validate::IP module through 0.29 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.
- Record
EUVD-2021-16136- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-r243-xrwf-w499
The Data::Validate::IP module through 0.29 for Perl does not properly consider extraneous zero...
The Data::Validate::IP module through 0.29 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.
- Record
GHSA-r243-xrwf-w499- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
OSV
The Data::Validate::IP module through 0.29 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.
- Record
CVE-2021-29662- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-29662
The Data::Validate::IP module through 0.29 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.
- Record
DEBIAN-CVE-2021-29662- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-29662
The Data::Validate::IP module through 0.29 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.
- Record
UBUNTU-CVE-2021-29662- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libdata-validate-ip-perlDebian:12 |
before 0.30-1 | 0.30-1 |
libdata-validate-ip-perlDebian:13 |
before 0.30-1 | 0.30-1 |
libdata-validate-ip-perlDebian:14 |
before 0.30-1 | 0.30-1 |
libdata-validate-ip-perlUbuntu:16.04:LTS |
All versions, plus listed versions 0.24-10.25-1 |
None known |
libdata-validate-ip-perlUbuntu:18.04:LTS |
All versions, plus listed versions 0.27-1 |
None known |
libdata-validate-ip-perlUbuntu:20.04:LTS |
All versions, plus listed versions 0.27-1 |
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-2021-29662 is a high vulnerability (CVSS 7.5) in Data\ \, published March 31, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.22%, the 82nd percentile. Fixed in libdata-validate-ip-perl 0.30-1.
References
blog.urth.org/2021/03/29/security-issues-in-perl-ip-address-distros
github.com/houseabsolute/Data-Validate-IP/commit/3bba13c819d616514a75e089badd75002fd4f14e
sick.codes/sick-2021-018
security.netapp.com/advisory/ntap-20210604-0002