Upstream information

CVE-2021-20247 at MITRE

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.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v2 Scores
CVSS detail National Vulnerability Database
Base Score 5.8
Vector AV:N/AC:M/Au:N/C:P/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None
CVSS v3 Scores
CVSS detail National Vulnerability Database
Base Score 7.4
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact None
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1182488 [RESOLVED / NORESPONSE]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Package Hub 15 SP2
  • isync >= 1.3.5-bp152.4.3.1
 Patchnames:
openSUSE-2021-533
openSUSE Leap 15.2
  • isync >= 1.3.5-lp152.4.3.1
 Patchnames:
openSUSE-2021-516
openSUSE Tumbleweed
  • isync >= 1.4.3-1.2
 Patchnames:
openSUSE-Tumbleweed-2024-10866

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products past their end of life and not receiving proactive updates anymore.
SUSE Package Hub 15 SP2 isync Released

SUSE Timeline for this CVE

CVE page created: Fri Feb 19 11:16:36 2021
CVE page last modified: Thu Dec 11 16:51:29 2025