CVE-2022-23645

Advisory lineage Upstream: 0 Downstream: 7
Modified
Published: 18 Feb 2022, 20:50
Last modified:23 Apr 2025, 19:02

Vulnerability Summary

Overall Risk (default)
medium
25/100
CVSS Score
6.2 MEDIUM
v3.1 (cve.org)
EPSS Score
0.03% LOW
0% probability -0.01%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

18 Feb 2022, 20:50
Published
Vulnerability first disclosed
23 Apr 2025, 19:02
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•MEDIUM•Score: 6.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.03%• Percentile: 9%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

    The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • fedoraproject•fedora

    35

  • redhat•enterprise_linux

    8.0

  • stefanberger•swtpm

    < 0.5.3 | ≥ 0.6.0, < 0.6.2 | = 0.7.0

  • swtpm_project•swtpm

    < 0.5.3 | ≥ 0.6.0, < 0.6.2 | 0.7.0 | 0.7.0:rc1 | 0.7.0:rc2

References (6)