CVE-2009-0563 Microsoft Office: memory-safety flaw
In plain words: The program mishandles the memory it uses to keep track of data. A specially made input can scramble that memory. Usually lets an attacker crash the program or run their own code with its permissions.
Confirmed exploited by CISA on · US federal patch deadline Jun 22, 2022
What to do
- Install Microsoft's security update for Office. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Turn on automatic updates for the operating system and for Office, PDF and archive apps.
- Be careful with unexpected attachments — documents, .zip/.rar files and shortcuts are common bait.
- Use a normal (non-admin) account day to day and keep built-in protection like Microsoft Defender on.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: Your files, saved passwords and accounts. Many of these let a program that is already running gain full administrator control.
The details
- Official name
- Microsoft Office Buffer Overflow Vulnerability
- Product
- Microsoft Office
- CISA description
- Microsoft Office contains a buffer overflow vulnerability that allows remote attackers to execute code via a Word document with a crafted tag containing an invalid length field.
- Type of flaw
- Memory-safety flaw (CWE-119)
- Confirmed exploited
- Jun 8, 2022
- US federal patch deadline
- Jun 22, 2022
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Answering about CVE-2009-0563 ·
Questions about CVE-2009-0563
Is CVE-2009-0563 being exploited?
Yes. CISA added CVE-2009-0563 to its Known Exploited Vulnerabilities catalog on Jun 8, 2022, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2009-0563?
Install Microsoft's security update for Office. If no update exists, follow the vendor's workaround or stop using the product until one ships. Turn on automatic updates for the operating system and for Office, PDF and archive apps.
Am I affected by CVE-2009-0563?
Only if you use Microsoft Office. This one is aimed at devices or apps of the kind people own.