CVE-2018-20187 · cross-distro fix matrix

CVE-2018-20187: A side-channel issue was discovered in Botan before 2.9.0. An attacker capable of precisely measuring the time taken for ECC key generation may be able to derive information about the high bits of the secret key, as the function to derive the public point from the secret scalar uses an unblinded Mon

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

Fix per ecosystem

Each block below is a distro release where CVE-2018-20187 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

botan→ fixed in2.9.0-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y botan
```

Debian bookworm

Source: Debian Security Tracker

botan→ fixed in2.9.0-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y botan
```

Debian trixie

Source: Debian Security Tracker

botan→ fixed in2.9.0-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y botan
```

Alpine v3.20

Source: Alpine secdb

botan→ fixed in2.9.0-r0
```
apk update && apk add --upgrade botan
```

Alpine v3.21

Source: Alpine secdb

botan→ fixed in2.9.0-r0
```
apk update && apk add --upgrade botan
```

Alpine v3.18

Source: Alpine secdb

botan→ fixed in2.9.0-r0
```
apk update && apk add --upgrade botan
```

Alpine v3.19

Source: Alpine secdb

botan→ fixed in2.9.0-r0
```
apk update && apk add --upgrade botan
```

Are YOU affected by CVE-2018-20187?

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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