CVE-2021-44143 · cross-distro fix matrix

CVE-2021-44143: A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that starts with an empty line) to provoke a heap overflow, which could conceivably be exploited for remote co

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-44143 has a known fix. Run the listed command on that distro to remediate.

Debian bookworm

Source: Debian Security Tracker

isync→ fixed in1.4.4-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y isync
```

Debian trixie

Source: Debian Security Tracker

isync→ fixed in1.4.4-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y isync
```

Alpine v3.20

Source: Alpine secdb

isync→ fixed in1.4.4-r0
```
apk update && apk add --upgrade isync
```

Alpine v3.21

Source: Alpine secdb

isync→ fixed in1.4.4-r0
```
apk update && apk add --upgrade isync
```

Alpine edge

Source: Alpine secdb

isync→ fixed in1.4.4-r0
```
apk update && apk add --upgrade isync
```

Alpine v3.18

Source: Alpine secdb

isync→ fixed in1.4.4-r0
```
apk update && apk add --upgrade isync
```

Alpine v3.19

Source: Alpine secdb

isync→ fixed in1.4.4-r0
```
apk update && apk add --upgrade isync
```

Are YOU affected by CVE-2021-44143?

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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