CVE-2021-47154 · cross-distro fix matrix

CVE-2021-47154: 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.

Affects 3 Linux releases across 3 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-47154 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

libnet-cidr-lite-perl→ fixed in0.22-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libnet-cidr-lite-perl
```

Debian bookworm

Source: Debian Security Tracker

libnet-cidr-lite-perl→ fixed in0.22-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libnet-cidr-lite-perl
```

Debian trixie

Source: Debian Security Tracker

libnet-cidr-lite-perl→ fixed in0.22-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libnet-cidr-lite-perl
```

Are YOU affected by CVE-2021-47154?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan View on NVD

Continuous monitoring beats manual checking

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