CVE-2020-1730 · cross-distro fix matrix

CVE-2020-1730: A flaw was found in libssh versions before 0.8.9 and before 0.9.4 in the way it handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn't been fully initialized and the system tries to cleanup the ciphers when closing the connection. The biggest

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

Fix per ecosystem

Each block below is a distro release where CVE-2020-1730 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

libssh→ fixed in0.9.4-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libssh
```

Debian bookworm

Source: Debian Security Tracker

libssh→ fixed in0.9.4-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libssh
```

Debian trixie

Source: Debian Security Tracker

libssh→ fixed in0.9.4-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libssh
```

Alpine v3.20

Source: Alpine secdb

libssh→ fixed in0.9.4-r0
```
apk update && apk add --upgrade libssh
```

Alpine v3.21

Source: Alpine secdb

libssh→ fixed in0.9.4-r0
```
apk update && apk add --upgrade libssh
```

Alpine edge

Source: Alpine secdb

libssh→ fixed in0.9.4-r0
```
apk update && apk add --upgrade libssh
```

Alpine v3.18

Source: Alpine secdb

libssh→ fixed in0.9.4-r0
```
apk update && apk add --upgrade libssh
```

Alpine v3.19

Source: Alpine secdb

libssh→ fixed in0.9.4-r0
```
apk update && apk add --upgrade libssh
```

Are YOU affected by CVE-2020-1730?

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

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