CVE-2021-3657
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Isync
PublishedFeb 18, 2022
First seenFeb 18, 2022
Weakness typeCWE-119Memory buffer bounds error
How to fix
Update
- isync_project isync1.4.4 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| isync_project isync | v < 1.4.4 | 1.4.4 |
| fedoraproject fedora | 35 | — |
| redhat enterprise_linux | 7.0 | — |
| debian debian_linux | 9.0 | — |
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