CVE-2021-47154
Publication date 18 March 2024
Last updated 8 June 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libnet-cidr-lite-perl | 26.04 LTS resolute |
Not affected
|
| 25.10 questing |
Not affected
|
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Fixed 0.21-2ubuntu0.1
|
|
| 18.04 LTS bionic |
Fixed 0.21-1ubuntu0.18.04.1~esm1
|
|
| 16.04 LTS xenial | Ignored end of ESM support, was needs-triage |
Get expanded security coverage with Ubuntu Pro
Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.
Get Ubuntu Pro 30-day free trialSeverity score breakdown
| Parameter | Value |
|---|---|
| Base score |
6.3 · Medium
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L |
References
Related Ubuntu Security Notices (USN)
- USN-6712-1
- Net::CIDR::Lite vulnerability
- 25 March 2024
- USN-8406-1
- Net::CIDR::Lite vulnerabilities
- 8 June 2026