CVE-2021-47154 Security feature bypass in n/a
Attackers can bypass IP-based access controls by using leading zeros in IP addresses, affecting applications using the Perl Net::CIDR::Lite module.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-47154?
CVE-2021-47154 is a medium-severity vulnerability in n/a, published on 18 Mar 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2021-47154?
Linux distribution packages (2)
perl-Net-CIDR-Lite SUSE:Linux Enterprise Module for Development Tools 15 SP5 | All versions | 0.21-150100.6.3.1 |
perl-Net-CIDR-Lite openSUSE:Leap 15.5 | All versions | 0.21-150100.6.3.1 |
How do I fix CVE-2021-47154?
Upgrade to a fixed version.
Is CVE-2021-47154 being exploited?
There is no known exploitation of CVE-2021-47154 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2021-47154, DLA-3770-1, GHSA-gpvh-42rv-p6wg, OESA-2024-1303, OESA-2024-1304, OESA-2024-1305 and 3 more.