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[email protected]CVE-2021-40116

HistoryOct 27, 2021 - 7:15 p.m.

CVE-2021-40116

2021-10-2719:15:08

CWE-241

[email protected]

web.nvd.nist.gov

cve-2021-40116

cisco

snort

vulnerability

denial of service

dos

unauthenticated

remote attacker

7.1 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

8.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.5 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

49.8%

JSON

Multiple Cisco products are affected by a vulnerability in Snort rules that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.The vulnerability is due to improper handling of the Block with Reset or Interactive Block with Reset actions if a rule is configured without proper constraints. An attacker could exploit this vulnerability by sending a crafted IP packet to the affected device. A successful exploit could allow the attacker to cause through traffic to be dropped. Note: Only products with Snort3 configured and either a rule with Block with Reset or Interactive Block with Reset actions configured are vulnerable. Products configured with Snort2 are not vulnerable.

Affected configurations

NVD

Node

ciscofirepower_management_centerMatch3.1.0.1

ciscofirepower_threat_defenseRange6.4.0–6.4.0.13

ciscofirepower_threat_defenseRange6.6.0–6.6.5.1

ciscofirepower_threat_defenseRange6.7.0–6.7.0.3

ciscofirepower_threat_defenseRange7.0.0–7.0.1

Node

snortsnortRange3.0.0.0–3.1.0.100

CPENameOperatorVersion
cisco:firepower_management_centercisco firepower management centereq3.1.0.1
cisco:firepower_threat_defensecisco firepower threat defenselt6.4.0.13
cisco:firepower_threat_defensecisco firepower threat defenselt6.6.5.1
cisco:firepower_threat_defensecisco firepower threat defenselt6.7.0.3
cisco:firepower_threat_defensecisco firepower threat defenselt7.0.1

CPE	Name	Operator	Version
cisco:firepower_management_center	cisco firepower management center	eq	3.1.0.1
cisco:firepower_threat_defense	cisco firepower threat defense	lt	6.4.0.13
cisco:firepower_threat_defense	cisco firepower threat defense	lt	6.6.5.1
cisco:firepower_threat_defense	cisco firepower threat defense	lt	6.7.0.3
cisco:firepower_threat_defense	cisco firepower threat defense	lt	7.0.1

CNA Affected

[
  {
    "product": "Cisco Firepower Threat Defense Software ",
    "vendor": "Cisco",
    "versions": [
      {
        "status": "affected",
        "version": "n/a"
      }
    ]
  }
]

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-dos-RywH7ezM

7.1 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

8.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.5 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

49.8%

JSON

Related for CVE-2021-40116

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