Protected-memory access via rewriteable isolation entries
Published Feb 25, 2022 · Updated Aug 3, 2024
Out-of-bounds memory access in Huawei smartphone permission isolation allows remote attackers to access protected memory. The modem can directly rewrite Dynamic Memory Security System access-security-information entries that define DDR access permissions. Reachability requires control of the cellular modem; rewriting those entries bypasses the memory firewall and exposes otherwise isolated DDR regions.
Summary
What happened
Out-of-bounds memory access in Huawei smartphone permission isolation allows remote attackers to access protected memory. The modem can directly rewrite Dynamic Memory Security System access-security-information entries that define DDR access permissions. Reachability requires control of the cellular modem; rewriting those entries bypasses the memory firewall and exposes otherwise isolated DDR regions.
The record
- CVE
- CVE-2021-22431
- Published
- Feb 25, 2022
- Updated
- Aug 3, 2024
- Vendor
- MindSpore
- Product
- HarmonyOS
- Classifications
- CWE-119
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 25, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=2.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Black Hat USA 2021 DMSS overwrite demonstrationfunctional · demonstrated
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Technologies
Your stack
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Your stack
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