Vulnerability Description
swtpm is a libtpms-based TPM emulator with socket, character device, and Linux CUSE interface. Versions prior to 0.5.3, 0.6.2, and 0.7.1 are vulnerable to out-of-bounds read. A specially crafted header of swtpm's state, where the blobheader's hdrsize indicator has an invalid value, may cause an out-of-bounds access when the byte array representing the state of the TPM is accessed. This will likely crash swtpm or prevent it from starting since the state cannot be understood. Users should upgrade to swtpm v0.5.3, v0.6.2, or v0.7.1 to receive a patch. There are currently no known workarounds.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Swtpm Project | Swtpm | < 0.5.3 |
| Redhat | Enterprise Linux | 8.0 |
| Fedoraproject | Fedora | 35 |
Related Weaknesses (CWE)
References
- https://github.com/stefanberger/swtpm/commit/9f740868fc36761de27df3935513bdebf88PatchThird Party Advisory
- https://github.com/stefanberger/swtpm/releases/tag/v0.5.3Release NotesThird Party Advisory
- https://github.com/stefanberger/swtpm/releases/tag/v0.6.2Release NotesThird Party Advisory
- https://github.com/stefanberger/swtpm/releases/tag/v0.7.1Release NotesThird Party Advisory
- https://github.com/stefanberger/swtpm/security/advisories/GHSA-2qgm-8xf4-3hqwPatchThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://github.com/stefanberger/swtpm/commit/9f740868fc36761de27df3935513bdebf88PatchThird Party Advisory
- https://github.com/stefanberger/swtpm/releases/tag/v0.5.3Release NotesThird Party Advisory
- https://github.com/stefanberger/swtpm/releases/tag/v0.6.2Release NotesThird Party Advisory
- https://github.com/stefanberger/swtpm/releases/tag/v0.7.1Release NotesThird Party Advisory
- https://github.com/stefanberger/swtpm/security/advisories/GHSA-2qgm-8xf4-3hqwPatchThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2022-23645?
CVE-2022-23645 is a vulnerability with a CVSS score of 6.2 (MEDIUM). swtpm is a libtpms-based TPM emulator with socket, character device, and Linux CUSE interface. Versions prior to 0.5.3, 0.6.2, and 0.7.1 are vulnerable to out-of-bounds read. A specially crafted heade...
How severe is CVE-2022-23645?
CVE-2022-23645 has been rated MEDIUM with a CVSS base score of 6.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-23645?
Check the references section above for vendor advisories and patch information. Affected products include: Swtpm Project Swtpm, Redhat Enterprise Linux, Fedoraproject Fedora.