Out-of-Bounds Affecting isync package, versions <1.4.4-1


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
1.7% (88th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-ISYNC-2309759
  • published4 Dec 2021
  • disclosed18 Feb 2022

Introduced: 4 Dec 2021

CVE-2021-3657  (opens in a new tab)
CWE-119  (opens in a new tab)

How to fix?

Upgrade Debian:unstable isync to version 1.4.4-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream isync package and not the isync package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.

CVSS Scores

version 3.1