CVE-2021-3657
medium
CVSS v3
—
CVSS v2
—
VIR risk
5.5
Description
A flaw was found in mbsync versions prior to 1.4.4. Due to inadequate handling of extremely large (>=2GiB) IMAP literals, malicious or compromised IMAP servers, and hypothetically even external email senders, could cause several different buffer overflows, which could conceivably be exploited for remote code execution.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-3657
Vendor advisory: arch — https://security.archlinux.org/ASA-202112-5
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 1.4.4-1 | |
| debian | bookworm | fixed | 1.4.4-1 |
| debian | bullseye | fixed | 1.3.0-2.2+deb11u1 |
| debian | forky | fixed | 1.4.4-1 |
| debian | sid | fixed | 1.4.4-1 |
| debian | trixie | fixed | 1.4.4-1 |
References
Verify integrity in audit chain (admin only). AS-IS.