CVE-2022-41352 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 Nov 10, 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) allows an attacker to upload arbitrary files using cpio package to gain incorrect access to any other user accounts.
- Type of flaw
- File path flaw (CWE-22)
- Confirmed exploited
- Oct 20, 2022 — known to be used in ransomware attacks
- US federal patch deadline
- Nov 10, 2022
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Answering about CVE-2022-41352 ·
Questions about CVE-2022-41352
Is CVE-2022-41352 being exploited?
Yes. CISA added CVE-2022-41352 to its Known Exploited Vulnerabilities catalog on Oct 20, 2022, which means there is reliable evidence of real-world attacks, including by ransomware groups.
How do I fix CVE-2022-41352?
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-2022-41352?
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.