Secure stack disclosure via uninitialized FP restore
Published Oct 31, 2024 · Updated Oct 31, 2024
Information disclosure in Arm Compiler for Embedded and Arm Compiler for Embedded FuSa allows attackers to read Secure stack data via CMSE calls. In CMSESaveClearFPRegsV8, VLSTM skips the save while CONTROL_S.SFPA is clear, but a floating-point return sets the bit before VLLDM restores uninitialized Secure stack bytes into floating-point registers. Exposure requires generated Armv8-M Mainline hard-float code whose first floating-point use after Secure-state entry is a Secure-to-Non-secure call returning a floating-point value.
Summary
What happened
Information disclosure in Arm Compiler for Embedded and Arm Compiler for Embedded FuSa allows attackers to read Secure stack data via CMSE calls. In CMSESaveClearFPRegsV8, VLSTM skips the save while CONTROL_S.SFPA is clear, but a floating-point return sets the bit before VLLDM restores uninitialized Secure stack bytes into floating-point registers. Exposure requires generated Armv8-M Mainline hard-float code whose first floating-point use after Secure-state entry is a Secure-to-Non-secure call returning a floating-point value.
The record
- CVE
- CVE-2024-7883
- Published
- Oct 31, 2024
- Updated
- Oct 31, 2024
- Vendor
- Arm
- Product
- Arm Compiler for Embedded
- Classifications
- CWE-226
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 31, 2024CVE publishedPublication date reported by the CVE source.
- Oct 31, 2024Record updatedLatest update available in the CVE record.
Exploitability
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Is a vulnerable build present?
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- Affected versionversion=6.6 <=6.22 changes=[{"at":"6.23","status":"unaffected"}]
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What is affected?
Published CVSS scores
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Attacks
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Technologies
Your stack
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Your stack
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