| Risk | High |
| Patch available | NO |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-3566 CVE-2020-3569 |
| CWE-ID | CWE-400 |
| Exploitation vector | Network |
| Public exploit |
Vulnerability #1 is being exploited in the wild. Vulnerability #2 is being exploited in the wild. |
| Vulnerable software Subscribe |
Cisco ASR 9000 Series Aggregation Services Routers Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco IOS XR Operating systems & Components / Operating system |
| Vendor | Cisco Systems, Inc |
This security bulletin contains information about 2 vulnerabilities.
Updated: 01.09.2020
Added vulnerability #2.
EUVDB-ID: #VU46126
Risk: High
CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:U/RC:C]
CVE-ID: CVE-2020-3566
CWE-ID:
CWE-400 - Uncontrolled Resource Consumption ('Resource Exhaustion')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient queue management for Internet Group Management Protocol (IGMP) packets in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software. A remote attacker can trigger resource exhaustion by sending crafted IGMP traffic to the affected device and perform a denial of service (DoS) attack.
Note: this vulnerability is being actively exploited in the wild.
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsCisco ASR 9000 Series Aggregation Services Routers: 6.4.2, 6.6, 6.6.3, 7.0
Cisco IOS XR: 6.0.1, 6.0.2, 6.1.1, 6.1.2, 6.1.3, 6.1.4, 6.2.1, 6.2.3, 6.2.25, 6.3.2, 6.3.3, 6.3.15, 6.4.1, 6.4.2, 6.4.3, 6.5.2, 6.5.3, 6.6.1, 6.6.2, 6.6.3, 6.6.25, 7.0.1, 7.0.2, 7.1.1, 7.1.2, 7.1.3, 7.2.1, 7.3.1
CPE2.3http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv54838
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
EUVDB-ID: #VU46200
Risk: High
CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:H/RL:U/RC:C]
CVE-ID: CVE-2020-3569
CWE-ID:
CWE-400 - Uncontrolled Resource Consumption ('Resource Exhaustion')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient queue management for Internet Group Management Protocol (IGMP) packets in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software. A remote attacker can trigger resource exhaustion by sending crafted IGMP traffic to the affected device and perform a denial of service (DoS) attack.
Note: this vulnerability is being actively exploited in the wild. MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsCisco IOS XR: 6.6.3
CPE2.3http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr86414
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?
Yes. This vulnerability is being exploited in the wild.