CVE-2020-12846: Malicious File Upload
First published: Wed Jun 03 2020(Updated: )
Zimbra before 8.8.15 Patch 10 and 9.x before 9.0.0 Patch 3 allows remote code execution via an avatar file. There is potential abuse of /service/upload servlet in the webmail subsystem. A user can upload executable files (exe,sh,bat,jar) in the Contact section of the mailbox as an avatar image for a contact. A user will receive a "Corrupt File" error, but the file is still uploaded and stored locally in /opt/zimbra/data/tmp/upload/, leaving it open to possible remote execution.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Synacor Zimbra Collaboration Suite | <8.8.15 | |
| Synacor Zimbra Collaboration Suite | =8.8.15 | |
| Synacor Zimbra Collaboration Suite | =8.8.15-p1 | |
| Synacor Zimbra Collaboration Suite | =8.8.15-p2 | |
| Synacor Zimbra Collaboration Suite | =8.8.15-p3 | |
| Synacor Zimbra Collaboration Suite | =8.8.15-p4 | |
| Synacor Zimbra Collaboration Suite | =8.8.15-p5 | |
| Synacor Zimbra Collaboration Suite | =8.8.15-p6 | |
| Synacor Zimbra Collaboration Suite | =8.8.15-p7 | |
| Synacor Zimbra Collaboration Suite | =8.8.15-p8 | |
| Synacor Zimbra Collaboration Suite | =8.8.15-p9 | |
| Synacor Zimbra Collaboration Suite | =9.0.0 | |
| Synacor Zimbra Collaboration Suite | =9.0.0-p1 | |
| Synacor Zimbra Collaboration Suite | =9.0.0-p2 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2020-12846.
What is the severity level of CVE-2020-12846?
The severity level of CVE-2020-12846 is high with a value of 8.
Which software versions are affected by CVE-2020-12846?
Zimbra before 8.8.15 Patch 10 and 9.x before 9.0.0 Patch 3 are affected by CVE-2020-12846.
How can an attacker exploit CVE-2020-12846?
An attacker can exploit CVE-2020-12846 by uploading executable files (exe, sh, bat, jar) as an avatar image in the Contact section of the mailbox.
How can I fix CVE-2020-12846?
To fix CVE-2020-12846, update Zimbra to version 8.8.15 Patch 10 or 9.x Patch 3 or later.
- collector/nvd-index
- agent/severity
- agent/references
- agent/author
- agent/type
- agent/event
- agent/weakness
- agent/description
- agent/last-modified-date
- agent/first-publish-date
- agent/softwarecombine
- agent/tags
- collector/mitre-cve
- source/MITRE
- vendor/synacor
- canonical/synacor zimbra collaboration suite
- version/synacor zimbra collaboration suite/8.8.15
- version/synacor zimbra collaboration suite/8.8.15-p1
- version/synacor zimbra collaboration suite/8.8.15-p2
- version/synacor zimbra collaboration suite/8.8.15-p3
- version/synacor zimbra collaboration suite/8.8.15-p4
- version/synacor zimbra collaboration suite/8.8.15-p5
- version/synacor zimbra collaboration suite/8.8.15-p6
- version/synacor zimbra collaboration suite/8.8.15-p7
- version/synacor zimbra collaboration suite/8.8.15-p8
- version/synacor zimbra collaboration suite/8.8.15-p9
- version/synacor zimbra collaboration suite/9.0.0
- version/synacor zimbra collaboration suite/9.0.0-p1
- version/synacor zimbra collaboration suite/9.0.0-p2