TEE ASLR bypass via Widevine log pointer leak
Published Oct 6, 2021 · Updated Aug 3, 2024
Information disclosure in the Widevine TA log on selected Samsung Android 10 and 11 Exynos devices allows local users to bypass TEE ASLR. The Widevine trusted application exposes a pointer through its log instead of keeping the TEE address private, weakening address randomization. Exploitation requires local high-privilege access and high complexity, and the disclosed consequence is loss of ASLR protection rather than direct memory modification.
Summary
What happened
Information disclosure in the Widevine TA log on selected Samsung Android 10 and 11 Exynos devices allows local users to bypass TEE ASLR. The Widevine trusted application exposes a pointer through its log instead of keeping the TEE address private, weakening address randomization. Exploitation requires local high-privilege access and high complexity, and the disclosed consequence is loss of ASLR protection rather than direct memory modification.
The record
- CVE
- CVE-2021-25476
- Published
- Oct 6, 2021
- Updated
- Aug 3, 2024
- Vendor
- Samsung Electronics Co., Ltd.
- Product
- Samsung Mobile Devices
- Classifications
- CWE-1295
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Oct 6, 2021CVE 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=Select Q(10.0), R(11.0) devices with Exynos chipsets <SMR Oct-2021 Release 1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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