The Net::CIDR::Lite module before 0.22 for Perl does not properly consider extraneous…
Priority LOW 29Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00489 42nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2021-47154
- 2026-10-03 Alias added: GHSA-gpvh-42rv-p6wg
References
Other 5
- https://blog.urth.org/2021/03/29/security-issues-in-perl-ip-address-distros/
- https://metacpan.org/pod/Net::CIDR::Lite
- https://github.com/stigtsp/Net-CIDR-Lite/commit/23b6ff0590dc279521863a502e890ef19a5a76fc
- https://metacpan.org/dist/Net-CIDR-Lite/changes
- [debian-lts-announce] 20240323 [SECURITY] [DLA 3770-1] libnet-cidr-lite-perl security update
Sources
- CVE-2021-47154 · CVE Program
- CVE-2021-47154 · NVD
- FIRST EPSS
- GHSA-gpvh-42rv-p6wg · GitHub Advisory Database · CC BY 4.0
- CVE-2021-47154 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences