Multiple vulnerabilities in Cisco NX-OS Software
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2020-3338 CVE-2020-3398 CVE-2020-3397 |
| CWE-ID | CWE-400 CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Cisco NX-OS Operating systems & Components / Operating system Cisco Nexus 3000 Series Switches Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco Nexus 7000 Series Switches Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco Nexus 9000 Series Switches NX-OS Mode Hardware solutions / Routers & switches, VoIP, GSM, etc |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Resource exhaustion
EUVDB-ID: #VU46105
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-3338
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources when processing inbound PIM6 packets. A remote attacker can send multiple specially crafted PIM6 packets, trigger resource exhaustion and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco NX-OS: before 9.3.3
Cisco Nexus 3000 Series Switches: 9.2.4 - 9.3.3
Cisco Nexus 7000 Series Switches: 8.4.2.134
Cisco Nexus 9000 Series Switches NX-OS Mode: 7.0.3 I7.6 - 9.2.4
CPE2.3- cpe:2.3:o:cisco_systems:cisco_nx-os:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_nexus_3000_series_switches:9.2.4:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_nexus_3000_series_switches:9.3.3:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_nexus_7000_series_switches:8.4.2.134:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_nexus_9000_series_switches_nx-os_mode:7.0.3 I7.6:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_nexus_9000_series_switches_nx-os_mode:9.2.4:*:*:*:*:*:*:*
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Input validation error
EUVDB-ID: #VU46102
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-3398
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists in the Border Gateway Protocol (BGP) Multicast VPN (MVPN) implementation due to incorrect parsing of a specific type of BGP MVPN update message. A remote attacker can send this BGP MVPN update message and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco NX-OS: before 9.3.3
Cisco Nexus 3000 Series Switches: All versions
Cisco Nexus 7000 Series Switches: All versions
Cisco Nexus 9000 Series Switches NX-OS Mode: All versions
CPE2.3- cpe:2.3:o:cisco_systems:cisco_nx-os:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_nexus_3000_series_switches:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_nexus_7000_series_switches:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_nexus_9000_series_switches_nx-os_mode:*:*:*:*:*:*:*:*
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Input validation error
EUVDB-ID: #VU46101
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-3397
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists in the Border Gateway Protocol (BGP) Multicast VPN (MVPN) implementation due to incomplete input validation of a specific type of BGP MVPN update message. A remote attacker can send a specially crafted BGP MVPN update message and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco NX-OS: before 9.3.3
Cisco Nexus 3000 Series Switches: All versions
Cisco Nexus 9000 Series Switches NX-OS Mode: All versions
CPE2.3- cpe:2.3:o:cisco_systems:cisco_nx-os:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_nexus_3000_series_switches:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_nexus_9000_series_switches_nx-os_mode:*:*:*:*:*:*:*:*
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
