CVE-2021-3177 · cross-distro fix matrix

CVE-2021-3177: Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Python applications that accept floating-point numbers as untrusted input, as demonstrated by a 1e300 argument to c_double.from_param. This occurs because sprintf i

Affects 6 Linux releases across 7 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-3177 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

python2.7→ fixed in2.7.18-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y python2.7
```
python3.9→ fixed in3.9.1-3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y python3.9
```

Alpine v3.20

Source: Alpine secdb

python3→ fixed in3.8.7-r2
```
apk update && apk add --upgrade python3
```

Alpine v3.21

Source: Alpine secdb

python3→ fixed in3.8.7-r2
```
apk update && apk add --upgrade python3
```

Alpine edge

Source: Alpine secdb

python3→ fixed in3.8.7-r2
```
apk update && apk add --upgrade python3
```

Alpine v3.18

Source: Alpine secdb

python3→ fixed in3.8.7-r2
```
apk update && apk add --upgrade python3
```

Alpine v3.19

Source: Alpine secdb

python3→ fixed in3.8.7-r2
```
apk update && apk add --upgrade python3
```

Are YOU affected by CVE-2021-3177?

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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