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CiscoCVE-2020-3596

HistoryOct 08, 2020 - 5:15 a.m.

CVE-2020-3596

2020-10-0805:15:15

CWE-789

CWE-670

cisco

web.nvd.nist.gov

cisco

expressway

series

telepresence

vcs

sip

vulnerability

dos

denial of service

nvd

cve-2020-3596

CVSS2

7.8

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

CVSS3

7.5

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

AI Score

7.5

Confidence

High

EPSS

0.002

Percentile

52.6%

JSON

A vulnerability in the Session Initiation Protocol (SIP) of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect handling of incoming SIP traffic. An attacker could exploit this vulnerability by sending a series of SIP packets to an affected device. A successful exploit could allow the attacker to exhaust memory on an affected device, causing it to crash and leading to a DoS condition.

Affected configurations

Nvd

Node

ciscoexpresswayRange≤x12.6.3

ciscotelepresence_video_communication_serverRange≤x12.6.3

VendorProductVersionCPE
ciscoexpressway*cpe:2.3:a:cisco:expressway:*:*:*:*:*:*:*:*
ciscotelepresence_video_communication_server*cpe:2.3:a:cisco:telepresence_video_communication_server:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
cisco	expressway	*	cpe:2.3:a:cisco:expressway::::::::
cisco	telepresence_video_communication_server	*	cpe:2.3:a:cisco:telepresence_video_communication_server::::::::

CNA Affected

[
  {
    "product": "Cisco TelePresence Video Communication Server (VCS) Expressway",
    "vendor": "Cisco",
    "versions": [
      {
        "status": "affected",
        "version": "n/a"
      }
    ]
  }
]

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-vcs-dos-n6xxTMZB

CVSS2

7.8

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

CVSS3

7.5

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

AI Score

7.5

Confidence

High

EPSS

0.002

Percentile

52.6%

JSON

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