Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Synacor | Zimbra Collaboration Suite | < 8.8.15 |
Related Weaknesses (CWE)
References
- https://wiki.zimbra.com/wiki/Security_CenterRelease NotesVendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P3Vendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
- https://wiki.zimbra.com/wiki/Security_CenterRelease NotesVendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P3Vendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
FAQ
What is CVE-2020-12846?
CVE-2020-12846 is a vulnerability with a CVSS score of 8.0 (HIGH). 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 upl...
How severe is CVE-2020-12846?
CVE-2020-12846 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-12846?
Check the references section above for vendor advisories and patch information. Affected products include: Synacor Zimbra Collaboration Suite.