CVE-2021-20247

 

Published at: - 23-02-2021 08:15

Last modified: - 11-08-2022 03:15

Total changes: - 7

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

 

Verification logic

 

Reference

• https://bugzilla.redhat.com/show_bug.cgi?id=1928963
• https://www.openwall.com/lists/oss-security/2021/02/22/1
• FEDORA-2021-954ebabcf7-Mailing List, Third Party Advisory
• FEDORA-2021-ef8c2acfce-Mailing List, Third Party Advisory
• [debian-lts-announce] 20220701 [SECURITY] [DLA 3066-1] isync security update-Third Party Advisory
• GLSA-202208-15-

 

Keywords

NVD

 

CVE-2021-20247

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures