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 code execution.
Published 2021-11-22 20:15:18
Updated 2022-10-25 20:50:26
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Memory CorruptionExecute code

Exploit prediction scoring system (EPSS) score for CVE-2021-44143

7.91%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 94 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-44143

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
NIST
9.8
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
NIST

CWE ids for CVE-2021-44143

  • The product writes data past the end, or before the beginning, of the intended buffer.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-44143

Products affected by CVE-2021-44143

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