Out-of-bounds read in swtpm
CVE-2022-23645

6.2MEDIUM

Key Information:

Vendor

Stefanberger

Status
Swtpm
Vendor
CVE Published:
18 February 2022

What is CVE-2022-23645?

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.

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Affected Version(s)

swtpm < 0.5.3 < 0.5.3

swtpm >= 0.6.0, < 0.6.2 < 0.6.0, 0.6.2

swtpm = 0.7.0 = 0.7.0

References

https://github.com/stefanberger/swtpm/security/advisories...
x_refsource_CONFIRM
https://github.com/stefanberger/swtpm/commit/9f740868fc36...
x_refsource_MISC
https://github.com/stefanberger/swtpm/releases/tag/v0.5.3
x_refsource_MISC

CVSS V3.1

Score:
6.2
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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