CVE-2020-10188 · cross-distro fix matrix

CVE-2020-10188: utility.c in telnetd in netkit telnet through 0.17 allows remote attackers to execute arbitrary code via short writes or urgent data, because of a buffer overflow involving the netclear and nextitem functions.

Affects 3 Linux releases across 7 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2020-10188 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

inetutils→ fixed in2:1.9.4-12urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y inetutils
```
netkit-telnet→ fixed in0.17-18woody2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y netkit-telnet
```
netkit-telnet-ssl→ fixed in0.17.17+0.1-2woody3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y netkit-telnet-ssl
```

Debian bookworm

Source: Debian Security Tracker

inetutils→ fixed in2:1.9.4-12urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y inetutils
```
netkit-telnet-ssl→ fixed in0.17.17+0.1-2woody3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y netkit-telnet-ssl
```

Debian trixie

Source: Debian Security Tracker

inetutils→ fixed in2:1.9.4-12urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y inetutils
```
netkit-telnet-ssl→ fixed in0.17.17+0.1-2woody3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y netkit-telnet-ssl
```

Are YOU affected by CVE-2020-10188?

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.

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