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[email protected]CVE-2021-20177

HistoryMay 26, 2021 - 9:15 p.m.

CVE-2021-20177

2021-05-2621:15:08

CWE-125

[email protected]

web.nvd.nist.gov

233

cve-2021-20177

linux kernel

string matching

privileged user

iptables

panic

security flaw

2.1 Low

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

4.4 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

5.5 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

12.6%

JSON

A flaw was found in the Linux kernel’s implementation of string matching within a packet. A privileged user (with root or CAP_NET_ADMIN) when inserting iptables rules could insert a rule which can panic the system. Kernel before kernel 5.5-rc1 is affected.

Affected configurations

Vulners

NVD

Node

linuxlinux_kernelRange≤5.5

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::

CNA Affected

[
  {
    "product": "kernel",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "kernel 5.5-rc1"
      }
    ]
  }
]