CVE-2017-9525 · cross-distro fix matrix

CVE-2017-9525: In the cron package through 3.0pl1-128 on Debian, and through 3.0pl1-128ubuntu2 on Ubuntu, the postinst maintainer script allows for group-crontab-to-root privilege escalation via symlink attacks against unsafe usage of the chown and chmod programs.

Affects 3 Linux releases across 5 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2017-9525 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

cron→ fixed in3.0pl1-129urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y cron
```

Debian bookworm

Source: Debian Security Tracker

cron→ fixed in3.0pl1-129urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y cron
```
systemd-cron→ fixed in1.5.17-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y systemd-cron
```

Debian trixie

Source: Debian Security Tracker

cron→ fixed in3.0pl1-129urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y cron
```
systemd-cron→ fixed in1.5.17-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y systemd-cron
```

Are YOU affected by CVE-2017-9525?

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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