Remote DoS when processing IPSec packets in Cisco ASA
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2017-6609 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Cisco Adaptive Security Appliance (ASA) Hardware solutions / Security hardware applicances Cisco ASA 1000V Cloud Firewall Hardware solutions / Security hardware applicances Cisco ASA 5500 Hardware solutions / Security hardware applicances Cisco ASA 5500-X Series Hardware solutions / Security hardware applicances Cisco 7600 Series ASA Services Module Hardware solutions / Security hardware applicances Cisco Firepower 9300 ASA Security Module Hardware solutions / Security hardware applicances Cisco ISA 3000 Industrial Security Appliance Hardware solutions / Security hardware applicances Cisco Adaptive Security Virtual Appliance (ASAv) Server applications / Virtualization software |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Improper input validation
EUVDB-ID: #VU6311
Risk: Medium
CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2017-6609
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause denial of service vulnerability.
The vulnerability exists due to improper parsing of malformed IPsec packets. A remote authenticated attacker can send specially crafted IPsec packets to the affected system and perform a denial of service (DoS) attack. This vulnerability affects systems configured in routed firewall mode only and in single or multiple context mode. This vulnerability can be triggered by IPv4 and IPv6 traffic. An attacker needs to establish a valid IPsec tunnel before exploiting this vulnerability.
MitigationInstall updates from vendor's website:
|
Prior to 9.0 |
Affected, migrate to 9.1(7.8) or later |
|
9.0 |
Affected, migrate to 9.1(7.8) or later |
| 9.1 |
9.1(7.8) or later |
|
9.2 |
9.2(4.15) or later |
|
9.3 |
Affected, migrate to 9.4(4) or later |
| 9.4 |
9.4(4) or later |
|
9.5 |
9.5(3.2) or later |
| 9.6 | 9.6(2) or later |
Cisco Adaptive Security Appliance (ASA): 9.0 - 9.6.1
Cisco ASA 1000V Cloud Firewall: 8.7.1
Cisco ASA 5500: All versions
Cisco ASA 5500-X Series: All versions
Cisco 7600 Series ASA Services Module: All versions
Cisco Adaptive Security Virtual Appliance (ASAv): All versions
Cisco Firepower 9300 ASA Security Module: All versions
Cisco ISA 3000 Industrial Security Appliance: All versions
CPE2.3- cpe:2.3:h:cisco_systems:asa:9.0.4.37:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:asa:9.1.7.5:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:asa:9.2.4.9:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:asa:9.3.3:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:asa:9.4.3:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:asa:9.5.3.1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:asa:9.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_asa_1000v_cloud_firewall:8.7.1:*:*:*:*:asa:*:*
- cpe:2.3:h:cisco_systems:cisco_asa_5500:*:*:*:*:*:asa:*:*
- cpe:2.3:h:cisco_systems:cisco_asa_5500-x_series:*:*:*:*:*:asa:*:*
- cpe:2.3:h:cisco_systems:cisco_7600_series_asa_services_module:*:*:*:*:*:asa:*:*
- cpe:2.3:a:cisco_systems:cisco_adaptive_security_virtual_appliance_asav:*:*:*:*:*:asa:*:*
- cpe:2.3:h:cisco_systems:cisco_firepower_9300_asa_security_module:*:*:*:*:*:asa:*:*
- cpe:2.3:h:cisco_systems:cisco_isa_3000_industrial_security_appliance:*:*:*:*:*:asa:*:*
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-asa-ipsec
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
