CVE-2022-2652 Use of Externally-Controlled Format String in umlaeute/v4l2loopback

2022-08-0409:35:37

CWE-134

@huntrdev

www.cve.org

7.3 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

LOW

Availability Impact

LOW

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:L

0.0005 Low

EPSS

Percentile

17.9%

JSON

Depending on the way the format strings in the card label are crafted it’s possible to leak kernel stack memory. There is also the possibility for DoS due to the v4l2loopback kernel module crashing when providing the card label on request (reproduce e.g. with many %s modifiers in a row).

CNA Affected

[
  {
    "product": "umlaeute/v4l2loopback",
    "vendor": "umlaeute",
    "versions": [
      {
        "lessThan": "0.12.6",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]