CVE-2021-3677 · cross-distro fix matrix

CVE-2021-3677: A flaw was found in postgresql. A purpose-crafted query can read arbitrary bytes of server memory. In the default configuration, any authenticated database user can complete this attack at will. The attack does not require the ability to create objects. If server settings include max_worker_processe

Affects 4 Linux releases across 10 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-3677 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

postgresql-13→ fixed in13.4-0+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y postgresql-13
```

Alpine v3.20

Source: Alpine secdb

postgresql15→ fixed in13.4-r0

apk update && apk add --upgrade postgresql15

postgresql14→ fixed in13.4-r0

apk update && apk add --upgrade postgresql14

Alpine v3.18

Source: Alpine secdb

postgresql14→ fixed in13.4-r0

apk update && apk add --upgrade postgresql14

postgresql15→ fixed in13.4-r0

apk update && apk add --upgrade postgresql15

postgresql12→ fixed in12.8-r0

apk update && apk add --upgrade postgresql12

postgresql13→ fixed in13.4-r0

apk update && apk add --upgrade postgresql13

Alpine v3.19

Source: Alpine secdb

postgresql15→ fixed in13.4-r0

apk update && apk add --upgrade postgresql15

postgresql13→ fixed in13.4-r0

apk update && apk add --upgrade postgresql13

postgresql14→ fixed in13.4-r0

apk update && apk add --upgrade postgresql14

Are YOU affected by CVE-2021-3677?

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

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