CVE-2020-12846

high

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.

References

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P3

https://wiki.zimbra.com/wiki/Security_Center

Details

Source: Mitre, NVD

Published: 2020-06-03

Updated: 2020-06-05

Risk Information

CVSS v2

Base Score: 6

Vector: CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 8

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Severity: High