CVE-2019-6443 · cross-distro fix matrix

CVE-2019-6443: An issue was discovered in NTPsec before 1.1.3. Because of a bug in ctl_getitem, there is a stack-based buffer over-read in read_sysvars in ntp_control.c in ntpd.

Affects 8 Linux releases across 8 (distro × package) combinations.

Elevated exploitation risk

FIRST EPSS puts CVE-2019-6443's probability of exploitation in the next 30 days at 67% (99th percentile of all CVEs)— well above the noise floor. Prioritize it.

EPSS:67% · 30-day exploit probability99th percentile

Fix per ecosystem

Each block below is a distro release where CVE-2019-6443 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

ntpsec→ fixed in1.1.3+dfsg1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ntpsec
```

Debian bookworm

Source: Debian Security Tracker

ntpsec→ fixed in1.1.3+dfsg1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ntpsec
```

Debian trixie

Source: Debian Security Tracker

ntpsec→ fixed in1.1.3+dfsg1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ntpsec
```

Alpine v3.20

Source: Alpine secdb

ntpsec→ fixed in1.1.3-r0
```
apk update && apk add --upgrade ntpsec
```

Alpine v3.21

Source: Alpine secdb

ntpsec→ fixed in1.1.3-r0
```
apk update && apk add --upgrade ntpsec
```

Alpine edge

Source: Alpine secdb

ntpsec→ fixed in1.1.3-r0
```
apk update && apk add --upgrade ntpsec
```

Alpine v3.18

Source: Alpine secdb

ntpsec→ fixed in1.1.3-r0
```
apk update && apk add --upgrade ntpsec
```

Alpine v3.19

Source: Alpine secdb

ntpsec→ fixed in1.1.3-r0
```
apk update && apk add --upgrade ntpsec
```

Are YOU affected by CVE-2019-6443?

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

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