CVE-2020-28049 · cross-distro fix matrix

CVE-2020-28049: An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents and,

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

Fix per ecosystem

Each block below is a distro release where CVE-2020-28049 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

sddm→ fixed in0.19.0-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y sddm
```

Debian bookworm

Source: Debian Security Tracker

sddm→ fixed in0.19.0-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y sddm
```

Debian trixie

Source: Debian Security Tracker

sddm→ fixed in0.19.0-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y sddm
```

Alpine v3.20

Source: Alpine secdb

sddm→ fixed in0.19.0-r0
```
apk update && apk add --upgrade sddm
```

Alpine v3.21

Source: Alpine secdb

sddm→ fixed in0.19.0-r0
```
apk update && apk add --upgrade sddm
```

Alpine edge

Source: Alpine secdb

sddm→ fixed in0.19.0-r0
```
apk update && apk add --upgrade sddm
```

Alpine v3.18

Source: Alpine secdb

sddm→ fixed in0.19.0-r0
```
apk update && apk add --upgrade sddm
```

Alpine v3.19

Source: Alpine secdb

sddm→ fixed in0.19.0-r0
```
apk update && apk add --upgrade sddm
```

Are YOU affected by CVE-2020-28049?

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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