Out-of-bounds read via invalid state header
Published Feb 18, 2022 · Updated Apr 23, 2025
Out-of-bounds read in Stefan Berger SWTPM before 0.5.3, 0.6.0 through 0.6.1, or 0.7.0 allows local users to crash the TPM emulator via crafted state headers. The state loader trusts the blobheader hdrsize indicator when indexing the byte array that stores TPM state, so an invalid size drives an out-of-bounds access. A local user able to supply or replace the emulator state can trigger a crash or prevent startup, with no demonstrated confidentiality or integrity impact.
Summary
What happened
Out-of-bounds read in Stefan Berger SWTPM before 0.5.3, 0.6.0 through 0.6.1, or 0.7.0 allows local users to crash the TPM emulator via crafted state headers. The state loader trusts the blobheader hdrsize indicator when indexing the byte array that stores TPM state, so an invalid size drives an out-of-bounds access. A local user able to supply or replace the emulator state can trigger a crash or prevent startup, with no demonstrated confidentiality or integrity impact.
The record
- CVE
- CVE-2022-23645
- Published
- Feb 18, 2022
- Updated
- Apr 23, 2025
- Vendor
- libtpms Project
- Product
- SWTPM
- Classifications
- CWE-125, T1499
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 18, 2022CVE publishedPublication date reported by the CVE source.
- Apr 23, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 0.5.3
- Affected versionversion=>= 0.6.0, < 0.6.2
- Affected versionversion== 0.7.0
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.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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