CVE-2021-47156

CVE-2021-47156 is a medium-severity vulnerability with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1287.

Key facts

Description

The Net::IPAddress::Util module before 5.000 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.

Frequently asked questions

What is CVE-2021-47156?
The Net::IPAddress::Util module before 5.000 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.
How severe is CVE-2021-47156?
CVE-2021-47156 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-47156 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2021-47156?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-47156 have an EU (EUVD) identifier?
Yes. CVE-2021-47156 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-33804.
When was CVE-2021-47156 published?
CVE-2021-47156 was published on 2024-03-18 and last updated on 2026-06-17.

References

Other CWE-1287 vulnerabilities

Browse all CWE-1287 vulnerabilities →