CVE-2022-27925 Synacor Zimbra Collaboration Suite (ZCS): file path flaw
In plain words: The program can be tricked into reading or writing files outside the folder it should stay in. Leaks files such as passwords and settings, or overwrites important ones.
Confirmed exploited by CISA on · US federal patch deadline Sep 1, 2022
What to do
- Install Synacor's security update for Zimbra Collaboration Suite (ZCS). If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability
- Product
- Synacor Zimbra Collaboration Suite (ZCS)
- CISA description
- Synacor Zimbra Collaboration Suite (ZCS) contains flaw in the mboximport functionality, allowing an authenticated attacker to upload arbitrary files to perform remote code execution. This vulnerability was chained with CVE-2022-37042 which allows for unauthenticated remote code execution.
- Type of flaw
- File path flaw (CWE-22)
- Confirmed exploited
- Aug 11, 2022 — known to be used in ransomware attacks
- US federal patch deadline
- Sep 1, 2022
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Answering about CVE-2022-27925 ·
Questions about CVE-2022-27925
Is CVE-2022-27925 being exploited?
Yes. CISA added CVE-2022-27925 to its Known Exploited Vulnerabilities catalog on Aug 11, 2022, which means there is reliable evidence of real-world attacks, including by ransomware groups.
How do I fix CVE-2022-27925?
Install Synacor's security update for Zimbra Collaboration Suite (ZCS). If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2022-27925?
Only if you use Synacor Zimbra Collaboration Suite (ZCS). Aimed mostly at company systems — you are affected through the companies you use, not your own phone.