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CVE-2017-12231

high · 7.5Actively exploited

On the CISA Known Exploited Vulnerabilities catalog

Apply updates per vendor instructions.

Added 2022-03-03Remediation due 2022-03-24

A vulnerability in the implementation of Network Address Translation (NAT) functionality in Cisco IOS 12.4 through 15.6 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to the improper translation of H.323 messages that use the Registration, Admission, and Status (RAS) protocol and are sent to an affected device via IPv4 packets. An attacker could exploit this vulnerability by sending a crafted H.323 RAS packet through an affected device. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition. This vulnerability affects Cisco devices that are configured to use an application layer gateway with NAT (NAT ALG) for H.323 RAS messages. By default, a NAT ALG is enabled for H.323 RAS messages. Cisco Bug IDs: CSCvc57217.

7.5
CVSS
7.1%
EPSS (exploit prob.)
94th
EPSS percentile
2017-09-29
Published

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

Weaknesses

CWE-399

Affected products

VendorProductAffected versions
ciscoios>= 12.4, <= 15.6
cisco1100-4g/6g_integrated_services_routerall versions
cisco1100-4g_integrated_services_routerall versions
cisco1100-4gltegb_integrated_services_routerall versions
cisco1100-4gltena_integrated_services_routerall versions
cisco1100-4p_integrated_services_routerall versions
cisco1100-6g_integrated_services_routerall versions
cisco1100-8p_integrated_services_routerall versions
cisco1100-lte_integrated_services_routerall versions
cisco1100_integrated_services_routerall versions
cisco1100_terminal_services_gatewaysall versions
cisco1101-4p_integrated_services_routerall versions
cisco1101_integrated_services_routerall versions
cisco1109-2p_integrated_services_routerall versions
cisco1109-4p_integrated_services_routerall versions
cisco1109_integrated_services_routerall versions
cisco1111x-8p_integrated_services_routerall versions
cisco111x_integrated_services_routerall versions
cisco1120_integrated_services_routerall versions
cisco1131_integrated_services_routerall versions
cisco1160_integrated_services_routerall versions
cisco1801_integrated_service_routerall versions
cisco1802_integrated_service_routerall versions
cisco1803_integrated_service_routerall versions
cisco1811_integrated_service_routerall versions
cisco1812_integrated_service_routerall versions
cisco1841_integrated_service_routerall versions
cisco1861_integrated_service_routerall versions
cisco1905_integrated_services_routerall versions
cisco1906c_integrated_services_routerall versions
cisco1921_integrated_services_routerall versions
cisco1941_integrated_services_routerall versions
cisco1941w_integrated_services_routerall versions
cisco4000_integrated_services_routerall versions
cisco4221_integrated_services_routerall versions
cisco8101-32fhall versions
cisco8101-32hall versions
cisco8102-64hall versions
cisco8201all versions
cisco8201-32fhall versions

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References

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