CVE-2015-1821 · cross-distro fix matrix

CVE-2015-1821: Heap-based buffer overflow in chrony before 1.31.1 allows remote authenticated users to cause a denial of service (chronyd crash) or possibly execute arbitrary code by configuring the (1) NTP or (2) cmdmon access with a subnet size that is indivisible by four and an address with a nonzero bit in the

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

Fix per ecosystem

Each block below is a distro release where CVE-2015-1821 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

chrony→ fixed in1.30-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y chrony
```

Debian bookworm

Source: Debian Security Tracker

chrony→ fixed in1.30-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y chrony
```

Debian trixie

Source: Debian Security Tracker

chrony→ fixed in1.30-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y chrony
```

Are YOU affected by CVE-2015-1821?

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