VDB
CVE-2021-20247
CVE-2021-20247
PUBLISHED
CVSS 7.400000095367432 HIGH
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.
EPSS 1.88% · 79.3th percentile
Risk Scores
CVSS 3.1
7.400000095367432
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS Score
1.88%
79.3th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:24.04:LTS | isync | 0, 1.4.4-5build2, 1.4.4-5build3 |
| Ubuntu:20.04:LTS | isync | 0, 1.3.0-2 |
| Ubuntu:18.04:LTS | isync | 0, 1.2.1-2, 1.3.0-1 |
| Ubuntu:25.10 | isync | 1.5.1-1ubuntu1, 1.4.4-5build3, 0 |
| Ubuntu:22.04:LTS | isync | 1.4.4-3, 1.4.4-3ubuntu0.22.04.1, 1.3.0-2.2 |
| Ubuntu:16.04:LTS | isync | 1.1.2-1, 0 |
Timeline
- Feb 23, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 25, 2021 EPSS Score
- Dec 30, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Mar 3, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 5, 2022 EPSS Score
- Sep 9, 2022 EPSS Score
- Nov 11, 2022 EPSS Score
References
- https://www.openwall.com/lists/oss-security/2021/02/22/1 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-20247 third-party-advisory
- https://ubuntu.com/security/CVE-2021-20247 advisory