CVE-2018-5732 · cross-distro fix matrix

CVE-2018-5732: Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP version

Affects 6 Linux releases across 6 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2018-5732 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

isc-dhcp→ fixed in4.3.5-3.1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y isc-dhcp
```

Debian bookworm

Source: Debian Security Tracker

isc-dhcp→ fixed in4.3.5-3.1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y isc-dhcp
```

Debian trixie

Source: Debian Security Tracker

isc-dhcp→ fixed in4.3.5-3.1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y isc-dhcp
```

Alpine v3.20

Source: Alpine secdb

dhcp→ fixed in4.4.1-r0
```
apk update && apk add --upgrade dhcp
```

Alpine v3.18

Source: Alpine secdb

dhcp→ fixed in4.4.1-r0
```
apk update && apk add --upgrade dhcp
```

Alpine v3.19

Source: Alpine secdb

dhcp→ fixed in4.4.1-r0
```
apk update && apk add --upgrade dhcp
```

Are YOU affected by CVE-2018-5732?

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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