Directory Traversal Affecting isync package, versions <1.4.1-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
1.88% (77th percentile)

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  • Snyk IDSNYK-ALPINE321-ISYNC-8486692
  • published6 Dec 2024
  • disclosed23 Feb 2021

Introduced: 23 Feb 2021

CVE-2021-20247  (opens in a new tab)
CWE-22  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Alpine:3.21 isync to version 1.4.1-r0 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 Alpine. See How to fix? for Alpine:3.21 relevant fixed versions and status.

A flaw was found in mbsync before v1.3.5 and v1.4.1. Validations of the mailbox names returned by IMAP LIST/LSUB do not occur allowing a malicious or compromised server to use specially crafted mailbox names containing '..' path components to access data outside the designated mailbox on the opposite end of the synchronization channel. The highest threat from this vulnerability is to data confidentiality and integrity.

CVSS Base Scores

version 3.1