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CiscoCVE-2019-16026

HistoryJan 26, 2020 - 5:15 a.m.

CVE-2019-16026

2020-01-2605:15:16

CWE-20

cisco

web.nvd.nist.gov

116

cve

2019

16026

cisco

mme

sctp

implementation

vulnerability

denial of service

dos

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

5.8

Confidence

High

EPSS

0.001

Percentile

47.1%

JSON

A vulnerability in the implementation of the Stream Control Transmission Protocol (SCTP) on Cisco Mobility Management Entity (MME) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an eNodeB that is connected to an affected device. The vulnerability is due to insufficient input validation of SCTP traffic. An attacker could exploit this vulnerability by leveraging a man-in-the-middle position between the eNodeB and the MME and then sending a crafted SCTP message to the MME. A successful exploit would cause the MME to stop sending SCTP messages to the eNodeB, triggering a DoS condition.

Affected configurations

Nvd

Node

ciscostarosRange<21.16.1

AND

ciscoasr_5000Match-

ciscoasr_5500Match-

ciscoasr_5700Match-

VendorProductVersionCPE
ciscostaros*cpe:2.3:o:cisco:staros:*:*:*:*:*:*:*:*
ciscoasr_5000-cpe:2.3:h:cisco:asr_5000:-:*:*:*:*:*:*:*
ciscoasr_5500-cpe:2.3:h:cisco:asr_5500:-:*:*:*:*:*:*:*
ciscoasr_5700-cpe:2.3:h:cisco:asr_5700:-:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
cisco	staros	*	cpe:2.3:o:cisco:staros::::::::
cisco	asr_5000	-	cpe:2.3:h:cisco:asr_5000:-:::::::*
cisco	asr_5500	-	cpe:2.3:h:cisco:asr_5500:-:::::::*
cisco	asr_5700	-	cpe:2.3:h:cisco:asr_5700:-:::::::*

CNA Affected

[
  {
    "product": "Cisco ASR 5000 Series Software",
    "vendor": "Cisco",
    "versions": [
      {
        "lessThan": "n/a",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200108-mme-dos

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

5.8

Confidence

High

EPSS

0.001

Percentile

47.1%

JSON

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