Secure World code execution via signed length overflow
Published Jun 26, 2023 · Updated Dec 4, 2024
A buffer overflow in Google Widevine Trusted Application 5.0.0 through 5.1.1 allows local users to crash the trustlet via a crafted command. The drm_verify_keys handler adds an attacker-controlled feature_name_len to the signed persist-prefix length; wraparound passes a 256-byte bound check, and memcpy then writes beyond the heap buffer. Exploitation requires high privileges in Android's Normal World and enables Secure World code execution, critical-file access or modification, or a trustlet crash.
Summary
What happened
A buffer overflow in Google Widevine Trusted Application 5.0.0 through 5.1.1 allows local users to crash the trustlet via a crafted command. The drm_verify_keys handler adds an attacker-controlled feature_name_len to the signed persist-prefix length; wraparound passes a 256-byte bound check, and memcpy then writes beyond the heap buffer. Exploitation requires high privileges in Android's Normal World and enables Secure World code execution, critical-file access or modification, or a trustlet crash.
The record
- CVE
- CVE-2022-48333
- Published
- Jun 26, 2023
- Updated
- Dec 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-190, T1068
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Jun 26, 2023CVE publishedPublication date reported by the CVE source.
- Dec 4, 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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
- Widevine drm_verify_keys crashing proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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