UBUNTU-CVE-2021-3657
- Source
- https://ubuntu.com/security/CVE-2021-3657
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3657.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-3657
- Upstream
- Published
- 2022-02-18T18:15:00Z
- Modified
- 2025-07-14T07:15:28.026514Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Ubuntu - medium
- Summary
- [none]
- Details
-
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.
- 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