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

2022-02-1820:50:10

CWE-125

GitHub_M

www.cve.org

6.2 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

6 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

14.3%

JSON

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.

CNA Affected

[
  {
    "product": "swtpm",
    "vendor": "stefanberger",
    "versions": [
      {
        "status": "affected",
        "version": "< 0.5.3"
      },
      {
        "status": "affected",
        "version": ">= 0.6.0, < 0.6.2"
      },
      {
        "status": "affected",
        "version": "= 0.7.0"
      }
    ]
  }
]