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CVE-2018-20685 · cross-distro fix matrix

CVE-2018-20685: In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side.

Affects 8 Linux releases across 13 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2018-20685 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

openssh→ fixed in1:7.9p1-5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openssh
```

Debian bookworm

Source: Debian Security Tracker

openssh→ fixed in1:7.9p1-5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openssh
```

Debian trixie

Source: Debian Security Tracker

openssh→ fixed in1:7.9p1-5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openssh
```

Alpine v3.20

Source: Alpine secdb

dropbear→ fixed in2020.79-r0

apk update && apk add --upgrade dropbear

openssh→ fixed in7.9_p1-r3
```
apk update && apk add --upgrade openssh
```

Alpine v3.21

Source: Alpine secdb

dropbear→ fixed in2020.79-r0

apk update && apk add --upgrade dropbear

openssh→ fixed in7.9_p1-r3
```
apk update && apk add --upgrade openssh
```

Alpine edge

Source: Alpine secdb

dropbear→ fixed in2020.79-r0

apk update && apk add --upgrade dropbear

openssh→ fixed in7.9_p1-r3
```
apk update && apk add --upgrade openssh
```

Alpine v3.18

Source: Alpine secdb

dropbear→ fixed in2020.79-r0

apk update && apk add --upgrade dropbear

openssh→ fixed in7.9_p1-r3
```
apk update && apk add --upgrade openssh
```

Alpine v3.19

Source: Alpine secdb

dropbear→ fixed in2020.79-r0

apk update && apk add --upgrade dropbear

openssh→ fixed in7.9_p1-r3
```
apk update && apk add --upgrade openssh
```

Are YOU affected by CVE-2018-20685?

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

Continuous monitoring beats manual checking

CVE-2018-20685dropped silently in your distro's update channel. Every new CVE is the same story. StackPatch runs the matcher hourly against all 5 sources and emails the exact remediation when something new applies to one of your servers. $99 lifetime, 50 founder seats, 30-day refund.

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