CVE-2021-25372 Samsung Mobile Devices: 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 Jul 20, 2023
What to do
- Install Samsung's security update for Mobile Devices. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Install system updates the day they come out — most phone zero-days are fixed in a point release.
- Restart your phone every few days; some spyware does not survive a reboot.
- If you are a journalist, activist, lawyer, politician or executive, turn on Lockdown Mode (iPhone) or Advanced Protection (Android).
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: Messages, photos, location, microphone and camera. The most serious ones are "zero-click": no tap needed from the owner. They are usually used as spyware against a small number of chosen people.
The details
- Official name
- Samsung Mobile Devices Improper Boundary Check Vulnerability
- Product
- Samsung Mobile Devices
- CISA description
- Samsung mobile devices contain an improper boundary check vulnerability within DSP driver that allows for out-of-bounds memory access.
- Type of flaw
- Memory-safety flaw (CWE-787)
- Confirmed exploited
- Jun 29, 2023
- US federal patch deadline
- Jul 20, 2023
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Answering about CVE-2021-25372 ·
Questions about CVE-2021-25372
Is CVE-2021-25372 being exploited?
Yes. CISA added CVE-2021-25372 to its Known Exploited Vulnerabilities catalog on Jun 29, 2023, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2021-25372?
Install Samsung's security update for Mobile Devices. If no update exists, follow the vendor's workaround or stop using the product until one ships. Install system updates the day they come out — most phone zero-days are fixed in a point release.
Am I affected by CVE-2021-25372?
Only if you use Samsung Mobile Devices. This one is aimed at devices or apps of the kind people own.