UBUNTU-CVE-2021-20247
- Source
- https://ubuntu.com/security/CVE-2021-20247
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20247.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-20247
- Upstream
- Published
- 2021-02-23T19:15:00Z
- Modified
- 2025-07-14T07:15:18.571648Z
- Severity
-
- 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Ubuntu - low
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Ubuntu:Pro:16.04:LTS / isync
Package
- Name
- isync
- Purl
- pkg:deb/ubuntu/isync@1.1.2-1?arch=source&distro=esm-apps/xenial
Ubuntu:Pro:18.04:LTS / isync
Package
- Name
- isync
- Purl
- pkg:deb/ubuntu/isync@1.3.0-1ubuntu0.18.04.0?arch=source&distro=esm-apps/bionic
Ubuntu:Pro:20.04:LTS / isync
Package
- Name
- isync
- Purl
- pkg:deb/ubuntu/isync@1.3.0-2?arch=source&distro=esm-apps/focal
Ubuntu:22.04:LTS / isync
Package
- Name
- isync
- Purl
- pkg:deb/ubuntu/isync@1.4.4-3ubuntu0.22.04.1?arch=source&distro=jammy
Ubuntu:24.04:LTS / isync
Package
- Name
- isync
- Purl
- pkg:deb/ubuntu/isync@1.4.4-5build3?arch=source&distro=noble