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cveRedhatCVE-2021-3573
HistoryAug 13, 2021 - 2:15 p.m.

CVE-2021-3573

2021-08-1314:15:07
CWE-362
redhat
web.nvd.nist.gov
273
2
cve-2021-3573
linux kernel
use-after-free
hci_sock_bound_ioctl
privilege escalation
system crash
nvd

CVSS2

6.9

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

CVSS3

6.4

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

6.7

Confidence

High

EPSS

0

Percentile

5.1%

JSON

A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system. This flaw affects the Linux kernel versions prior to 5.13-rc5.

Affected configurations

Nvd
Vulners
Node
linuxlinux_kernelRange<5.13
OR
linuxlinux_kernelMatch5.13rc1
OR
linuxlinux_kernelMatch5.13rc2
OR
linuxlinux_kernelMatch5.13rc3
OR
linuxlinux_kernelMatch5.13rc4
Node
redhatenterprise_linuxMatch6.0
OR
redhatenterprise_linuxMatch7.0
OR
redhatenterprise_linuxMatch8.0
Node
fedoraprojectfedoraMatch34
VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel5.13cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*
linuxlinux_kernel5.13cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*
linuxlinux_kernel5.13cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*
linuxlinux_kernel5.13cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:*
redhatenterprise_linux6.0cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
redhatenterprise_linux7.0cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
redhatenterprise_linux8.0cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
fedoraprojectfedora34cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

CNA Affected

[
  {
    "vendor": "n/a",
    "product": "kernel",
    "versions": [
      {
        "version": "kernel 5.13-rc5",
        "status": "affected"
      }
    ]
  }
]

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CVSS2

6.9

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

CVSS3

6.4

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

6.7

Confidence

High

EPSS

0

Percentile

5.1%

JSON
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