Out-of-bounds Read Affecting swtpm package, versions <0:0.7.0-3.20211109gitb79fd91.el9


Severity

Recommended
low

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.05% (17th percentile)

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  • Snyk IDSNYK-ALMALINUX9-SWTPM-5607902
  • published28 May 2023
  • disclosed15 Nov 2022

Introduced: 15 Nov 2022

CVE-2022-23645  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 swtpm to version 0:0.7.0-3.20211109gitb79fd91.el9 or higher.
This issue was patched in ALSA-2022:8100.

NVD Description

Note: Versions mentioned in the description apply only to the upstream swtpm package and not the swtpm package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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 Base Scores

version 3.1