CyberRota Analysis
This is a critical severity vulnerability with a CVSS score of 9.8. Public exploit code or proof-of-concept references have been detected in its references. It may be remotely exploitable.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
Detected Signals
exploit remote code execution code execution
Note: these links are listed for security research and verification purposes only.
CVE
CVE-2021-3657
Severity
CRITICAL
CVSS
9.8
EPSS
3.46%
Original NVD 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.
Related CVEs
Other vulnerabilities affecting the same vendor(s)