CVE catalog
CVE-2021-20247
isync: CVE-2021-20247
- Severity
- High · CVSS 7.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.88% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | isync | sid | 1.5.1-2 | fixed |
| Debian | isync | forky | 1.5.1-2 | fixed |
| Debian | isync | trixie | 1.5.1-1 | fixed |
| Debian | isync | bookworm | 1.4.4-5 | fixed |
| Opensuse | isync | tumbleweed | 1.4.3-1.2 | fixed |
| Opensuse | isync | leap 15.2 | 1.3.5-lp152.4.3.1 | fixed |
| Suse | isync | package hub 15 sp2 | 1.3.5-bp152.4.3.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | isync | source | sid | 1.3.0-2.1 | not yet assigned | Not reported | [983351] |
| Debian | isync | source | forky | 1.3.0-2.1 | not yet assigned | Not reported | [983351] |
| Debian | isync | source | trixie | 1.3.0-2.1 | not yet assigned | Not reported | [983351] |
| Debian | isync | source | bookworm | 1.3.0-2.1 | not yet assigned | Not reported | [983351] |
| Opensuse | isync | rpm | tumbleweed | 1.4.3-1.2 | Not reported | OPENSUSE-SU-2024:10866-1 | Not reported |
| Opensuse | isync | rpm | leap 15.2 | 1.3.5-lp152.4.3.1 | Not reported | OPENSUSE-SU-2021:0516-1 | Not reported |
| Suse | isync | rpm | package hub 15 sp2 | 1.3.5-bp152.4.3.1 | Not reported | OPENSUSE-SU-2021:0533-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [isync]Fixed
Details (2)
1.4.4-5· amd64 · bookwormFixed · Fixed:
1.3.0-2.1dsa · isync · debian · bookworm; dsa · isync · debian · 12
1.4.4-5· arm64 · bookwormFixed · Fixed:
1.3.0-2.1dsa · isync · debian · bookworm; dsa · isync · debian · 12
[Debian 13 (Trixie)]
- [isync]Fixed
Details (2)
1.5.1-1· amd64 · trixieFixed · Fixed:
1.3.0-2.1dsa · isync · debian · 13
1.5.1-1· arm64 · trixieFixed · Fixed:
1.3.0-2.1dsa · isync · debian · 13
[openSUSE Tumbleweed]
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2021_0516-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-20247]
- [https://osv.dev/vulnerability/DLA-3066-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2021:0516-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2021:0533-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2024:10866-1]
- [https://security-tracker.debian.org/tracker/CVE-2021-20247]
- [https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-20247.json]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]