CVE-2020-12846 File upload in n/a
Attackers can upload executable files as contact avatars in Zimbra webmail, bypassing validation to achieve remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-12846?
CVE-2020-12846 is a high-severity vulnerability in Synacor Zimbra Collaboration Suite, published on 3 Jun 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-434
Which versions are affected by CVE-2020-12846?
It affects 1 product.
Products include Synacor Zimbra Collaboration Suite.
How do I fix CVE-2020-12846?
No fix has been published for CVE-2020-12846 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-12846 being exploited?
There is no known exploitation of CVE-2020-12846 in the wild and no public exploit code.
Other vulnerabilities in Synacor Zimbra Collaboration Suite
- CVE-2024-45519 Synacor Zimbra Collaboration Suite (ZCS) Command Execution
- CVE-2022-41352 Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload
- CVE-2022-37042 Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass
- CVE-2022-27924 Synacor Zimbra Collaboration Suite (ZCS) Command Injection
- CVE-2020-7796 Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery
Sources
Also known as GHSA-7rh2-9v88-7mx9.