high
7.4
CWE
190
Advisory Published

cisco-sa-20200205-fxnxos-iosxr-cdp-dos: Cisco FXOS, IOS XR, and NX-OS Software Cisco Discovery Protocol Denial of Service Vulnerability

First published: Wed Feb 05 2020(Updated: )

A vulnerability in the Cisco Discovery Protocol implementation for Cisco FXOS Software, Cisco IOS XR Software, and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to a missing check when the affected software processes Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to exhaust system memory, causing the device to reload. Note: Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent). Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-fxnxos-iosxr-cdp-dos

Credit: Barak Hadad Armis

Affected SoftwareAffected VersionHow to fix
Cisco FXOS Software=2.7<2.7.1.106=2.6<2.6.1.187=2.4<Release no. TBD (May 2020)>=Earlier than 2.2=2.2<=2.3<2.3.1.173
2.7.1.106
2.6.1.187
Release no. TBD (May 2020)
2.3.1.173
Cisco IOS XR Software>=Earlier than 6.6=6.6<=7.0<7.0.2 (Mar 2020) or appropriate SMU
7.0.2 (Mar 2020) or appropriate SMU
Cisco IOS XR Software=7.0.1<NCS540L>=6.6.12<=6.6.25<NCS560=XRV9K<xrv9k-6.5.3.CSCvr78185=NCS5500<ncs5500-6.5.3.CSCvr78185=NCS5K<ncs5k-6.5.3.CSCvr78185=NCS560<ncs560-6.6.25.CSCvr78185=NCS540<ncs540-6.5.3.CSCvr78185=ASR9K-X64<asr9k-x64-6.5.3.CSCvr78185=6.5.3<ASR9K-PX=CRS-PX<hfr-px-6.4.2.CSCvr78185=6.4.2<ASR9K-PX=5.2.5<NCS6K
NCS540L
NCS560
xrv9k-6.5.3.CSCvr78185
ncs5500-6.5.3.CSCvr78185
ncs5k-6.5.3.CSCvr78185
ncs560-6.6.25.CSCvr78185
ncs540-6.5.3.CSCvr78185
asr9k-x64-6.5.3.CSCvr78185
ASR9K-PX
hfr-px-6.4.2.CSCvr78185
ASR9K-PX
NCS6K
Cisco NX-OS Software=8.4<8.4(1a)=8.3<8.4(1a)=8.2<8.4(1a)=8.1<8.4(1a)=7.3<8.4(1a)=6.2<6.2(29)=5.2<6.2(29)
8.4(1a)
8.4(1a)
8.4(1a)
8.4(1a)
8.4(1a)
6.2(29)
6.2(29)
Cisco NX-OS Software
Cisco NX-OS Software=5.2<5.2(1)SV3(4.1b)=Earlier than 5.2<5.2(1)SV3(4.1b)
5.2(1)SV3(4.1b)
5.2(1)SV3(4.1b)
Cisco NX-OS Software=7.0(3)I<7.0(3)I7(8) (Feb 2020) or appropriate SMU1=Earlier than 7.0(3)I<7.0(3)I7(8) (Feb 2020) or appropriate SMU1
7.0(3)I7(8) (Feb 2020) or appropriate SMU1
7.0(3)I7(8) (Feb 2020) or appropriate SMU1
Cisco NX-OS Software=8.4<8.4(2) (Mar 2020) or appropriate SMU1>=7.2=7.3=8.0=8.1=8.2<=8.3<8.4(2) (Mar 2020) or appropriate SMU1=6.2<6.2(24)=Earlier than 6.2<6.2(24)
8.4(2) (Mar 2020) or appropriate SMU1
8.4(2) (Mar 2020) or appropriate SMU1
6.2(24)
6.2(24)
Cisco NX-OS Software=14.2<14.2(1j)=14.1<14.2(1j)=14.0<14.2(1j)=13.2<13.2(9b)=13.1<13.2(9b)>=.1<13<13.2(9b)
14.2(1j)
14.2(1j)
14.2(1j)
13.2(9b)
13.2(9b)
13.2(9b)
Cisco UCS Software=4.0<4.0(4g)=3.2<3.2(3n)=Earlier than 3.2<3.2(3n)
4.0(4g)
3.2(3n)
3.2(3n)

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID?

    The vulnerability ID is cisco-sa-20200205-fxnxos-iosxr-cdp-dos.

  • What is the title of the vulnerability?

    The title of the vulnerability is Cisco FXOS IOS XR and NX-OS Software Cisco Discovery Protocol Denial of Service Vulnerability.

  • What is the severity of cisco-sa-20200205-fxnxos-iosxr-cdp-dos?

    The severity of cisco-sa-20200205-fxnxos-iosxr-cdp-dos is high with a severity value of 7.4.

  • Which software are affected by cisco-sa-20200205-fxnxos-iosxr-cdp-dos?

    The following software are affected by cisco-sa-20200205-fxnxos-iosxr-cdp-dos: Cisco FXOS Software, Cisco IOS XR Software, and Cisco NX-OS Software.

  • How can I fix cisco-sa-20200205-fxnxos-iosxr-cdp-dos?

    To fix cisco-sa-20200205-fxnxos-iosxr-cdp-dos, apply the appropriate software version or update provided by Cisco.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203