CVE-2023-4863 Google Chromium WebP: 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 Oct 4, 2023
What to do
- Install Google's security update for Chromium WebP. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Let the browser auto-update and relaunch it when it asks — the fix is not active until you do.
- Keep extensions to a minimum and remove ones you do not recognise.
- Stop using Internet Explorer and any browser that no longer gets updates.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: A malicious or hacked website can be enough. Browser bugs are often the first step in a longer attack on the whole computer or phone.
The details
- Official name
- Google Chromium WebP Heap-Based Buffer Overflow Vulnerability
- Product
- Google Chromium WebP
- CISA description
- Google Chromium WebP contains a heap-based buffer overflow vulnerability that allows a remote attacker to perform an out-of-bounds memory write via a crafted HTML page. This vulnerability can affect applications that use the WebP Codec.
- Type of flaw
- Memory-safety flaw (CWE-787)
- Confirmed exploited
- Sep 13, 2023
- US federal patch deadline
- Oct 4, 2023
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Answering about CVE-2023-4863 ·
Questions about CVE-2023-4863
Is CVE-2023-4863 being exploited?
Yes. CISA added CVE-2023-4863 to its Known Exploited Vulnerabilities catalog on Sep 13, 2023, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2023-4863?
Install Google's security update for Chromium WebP. If no update exists, follow the vendor's workaround or stop using the product until one ships. Let the browser auto-update and relaunch it when it asks — the fix is not active until you do.
Am I affected by CVE-2023-4863?
Only if you use Google Chromium WebP. This one is aimed at devices or apps of the kind people own.