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[email protected]CVE-2020-27718

HistoryDec 24, 2020 - 3:15 p.m.

CVE-2020-27718

2020-12-2415:15:12

[email protected]

web.nvd.nist.gov

cve-2020-27718

big-ip

asm

advanced waf

cpu usage

excessive

json payload

nvd

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.001 Low

EPSS

Percentile

42.6%

JSON

When a BIG-IP ASM or Advanced WAF system running version 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, or 11.6.1-11.6.5.2 processes requests with JSON payload, an unusually large number of parameters can cause excessive CPU usage in the BIG-IP ASM bd process.

Affected configurations

NVD

Node

f5big-ip_advanced_web_application_firewallRange11.6.1–11.6.5

f5big-ip_advanced_web_application_firewallRange12.1.0–12.1.5

f5big-ip_advanced_web_application_firewallRange13.1.0–13.1.3.5

f5big-ip_advanced_web_application_firewallRange14.1.0–14.1.3.1

f5big-ip_advanced_web_application_firewallRange15.0.0–15.1.1

f5big-ip_advanced_web_application_firewallRange16.0.0–16.0.1

f5big-ip_application_security_managerRange11.6.1–11.6.5

f5big-ip_application_security_managerRange12.1.0–12.1.5

f5big-ip_application_security_managerRange13.1.0–13.1.3.5

f5big-ip_application_security_managerRange14.1.0–14.1.3.1

f5big-ip_application_security_managerRange15.0.0–15.1.1

f5big-ip_application_security_managerRange16.0.0–16.0.1

CPENameOperatorVersion
f5:big-ip_advanced_web_application_firewallf5 big-ip advanced web application firewallle11.6.5
f5:big-ip_advanced_web_application_firewallf5 big-ip advanced web application firewallle12.1.5
f5:big-ip_advanced_web_application_firewallf5 big-ip advanced web application firewalllt13.1.3.5
f5:big-ip_advanced_web_application_firewallf5 big-ip advanced web application firewalllt14.1.3.1
f5:big-ip_advanced_web_application_firewallf5 big-ip advanced web application firewalllt15.1.1
f5:big-ip_advanced_web_application_firewallf5 big-ip advanced web application firewalllt16.0.1
f5:big-ip_application_security_managerf5 big-ip application security managerle11.6.5
f5:big-ip_application_security_managerf5 big-ip application security managerle12.1.5
f5:big-ip_application_security_managerf5 big-ip application security managerlt13.1.3.5
f5:big-ip_application_security_managerf5 big-ip application security managerlt14.1.3.1

CPE	Name	Operator	Version
f5:big-ip_advanced_web_application_firewall	f5 big-ip advanced web application firewall	le	11.6.5
f5:big-ip_advanced_web_application_firewall	f5 big-ip advanced web application firewall	le	12.1.5
f5:big-ip_advanced_web_application_firewall	f5 big-ip advanced web application firewall	lt	13.1.3.5
f5:big-ip_advanced_web_application_firewall	f5 big-ip advanced web application firewall	lt	14.1.3.1
f5:big-ip_advanced_web_application_firewall	f5 big-ip advanced web application firewall	lt	15.1.1
f5:big-ip_advanced_web_application_firewall	f5 big-ip advanced web application firewall	lt	16.0.1
f5:big-ip_application_security_manager	f5 big-ip application security manager	le	11.6.5
f5:big-ip_application_security_manager	f5 big-ip application security manager	le	12.1.5
f5:big-ip_application_security_manager	f5 big-ip application security manager	lt	13.1.3.5
f5:big-ip_application_security_manager	f5 big-ip application security manager	lt	14.1.3.1

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CNA Affected

[
  {
    "product": "BIG-IP ASM & Advanced WAF",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, 11.6.1-11.6.5.2"
      }
    ]
  }
]

References

support.f5.com/csp/article/K58102101

Social References

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.001 Low

EPSS

Percentile

42.6%

JSON

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