Trustlet code execution via wrapped length check
Published Jun 26, 2023 · Updated Nov 27, 2024
Buffer overflow in Google Widevine Trusted Application 5.0.0 through 5.1.1 allows local users to crash or execute code in the trustlet. The drm_verify_keys command treats total_len plus file_name_len as signed during a limit check; wraparound bypasses it before memcpy copies an attacker-sized file name past a 256-byte heap buffer. High privileges in Android's Normal World and a Nexus 6 with Qualcomm QSEE are required; successful exploitation permits access to critical files or crashes the trusted application.
Summary
What happened
Buffer overflow in Google Widevine Trusted Application 5.0.0 through 5.1.1 allows local users to crash or execute code in the trustlet. The drm_verify_keys command treats total_len plus file_name_len as signed during a limit check; wraparound bypasses it before memcpy copies an attacker-sized file name past a 256-byte heap buffer. High privileges in Android's Normal World and a Nexus 6 with Qualcomm QSEE are required; successful exploitation permits access to critical files or crashes the trusted application.
The record
- CVE
- CVE-2022-48334
- Published
- Jun 26, 2023
- Updated
- Nov 27, 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.
- Nov 27, 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 crash proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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