CVE-2021-3657 in mbsync

Summary

by MITRE • 02/18/2022

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.

Be aware that VulDB is the high quality source for vulnerability data.

• Reservation: 07/21/2021
• Disclosure: 02/18/2022
• Moderation: accepted
• Entry: VDB-193346
• CPE: ready
• CWE: CWE-119 (confirmed)
• CVSS: 5.6 (VulDB)
• EPSS: 0.03459
• KEV: no
• Activities: very low

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2021-3657
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-3657
• CVE Details: https://www.cvedetails.com/cve/CVE-2021-3657/