CVE-2022-30333 RARLAB UnRAR: 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 Aug 30, 2022
What to do
- Install RARLAB's security update for UnRAR. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Patch edge devices first — attackers often start scanning for them within hours of a fix.
- Never expose the device's admin page to the internet.
- After patching a device that was exposed, follow the vendor's compromise checks, end active sessions and change passwords.
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: They face the internet and guard the whole network, so a flaw here can hand attackers a way in — and these devices usually run no antivirus, so break-ins go unnoticed.
The details
- Official name
- RARLAB UnRAR Directory Traversal Vulnerability
- Product
- RARLAB UnRAR
- CISA description
- RARLAB UnRAR on Linux and UNIX contains a directory traversal vulnerability, allowing an attacker to write to files during an extract (unpack) operation.
- Type of flaw
- File path flaw (CWE-22, CWE-59)
- Confirmed exploited
- Aug 9, 2022 — known to be used in ransomware attacks
- US federal patch deadline
- Aug 30, 2022
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Answering about CVE-2022-30333 ·
Questions about CVE-2022-30333
Is CVE-2022-30333 being exploited?
Yes. CISA added CVE-2022-30333 to its Known Exploited Vulnerabilities catalog on Aug 9, 2022, which means there is reliable evidence of real-world attacks, including by ransomware groups.
How do I fix CVE-2022-30333?
Install RARLAB's security update for UnRAR. If no update exists, follow the vendor's workaround or stop using the product until one ships. Patch edge devices first — attackers often start scanning for them within hours of a fix.
Am I affected by CVE-2022-30333?
Only if you use RARLAB UnRAR. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.