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cvelistZephyrCVELIST:CVE-2021-3455
HistoryOct 19, 2021 - 10:25 p.m.

CVE-2021-3455 Disconnecting L2CAP channel right after invalid ATT request leads freeze

2021-10-1922:25:09
CWE-416
zephyr
www.cve.org
4
disconnecting l2cap channel
invalid att request
system freeze
zephyr
use after free
cwe-416
security advisory

CVSS3

4.3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

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

EPSS

0.001

Percentile

45.3%

Disconnecting L2CAP channel right after invalid ATT request leads freeze. Zephyr versions >= 2.4.0, >= 2.5.0 contain Use After Free (CWE-416). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7g38-3x9v-v7vp

CNA Affected

[
  {
    "product": "zephyr",
    "vendor": "zephyrproject-rtos",
    "versions": [
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "2.4.0",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "2.5.0",
        "versionType": "custom"
      }
    ]
  }
]

CVSS3

4.3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

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

EPSS

0.001

Percentile

45.3%

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