Vulnerability Monitor

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CVE-2017-12231

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.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 329 products from cisco, from cisco, from cisco and 326 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2017-09-29T01:34:48.747

Last Modified

2026-01-14T15:15:51.307

Status

Deferred

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

6.9

Weaknesses

Type: Secondary
CWE-399
Type: Primary
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	cisco	ios	≤ 15.6	Yes
Hardware	cisco	1100-4g\/6g_integrated_services_router	-	No
Hardware	cisco	1100-4g_integrated_services_router	-	No
Hardware	cisco	1100-4gltegb_integrated_services_router	-	No
Hardware	cisco	1100-4gltena_integrated_services_router	-	No
Hardware	cisco	1100-4p_integrated_services_router	-	No
Hardware	cisco	1100-6g_integrated_services_router	-	No
Hardware	cisco	1100-8p_integrated_services_router	-	No
Hardware	cisco	1100-lte_integrated_services_router	-	No
Hardware	cisco	1100_integrated_services_router	-	No
Hardware	cisco	1100_terminal_services_gateways	-	No
Hardware	cisco	1101-4p_integrated_services_router	-	No
Hardware	cisco	1101_integrated_services_router	-	No
Hardware	cisco	1109-2p_integrated_services_router	-	No
Hardware	cisco	1109-4p_integrated_services_router	-	No
Hardware	cisco	1109_integrated_services_router	-	No
Hardware	cisco	1111x-8p_integrated_services_router	-	No
Hardware	cisco	111x_integrated_services_router	-	No
Hardware	cisco	1120_integrated_services_router	-	No
Hardware	cisco	1131_integrated_services_router	-	No
Hardware	cisco	1160_integrated_services_router	-	No
Hardware	cisco	1801_integrated_service_router	-	No
Hardware	cisco	1802_integrated_service_router	-	No
Hardware	cisco	1803_integrated_service_router	-	No
Hardware	cisco	1811_integrated_service_router	-	No
Hardware	cisco	1812_integrated_service_router	-	No
Hardware	cisco	1841_integrated_service_router	-	No
Hardware	cisco	1861_integrated_service_router	-	No
Hardware	cisco	1905_integrated_services_router	-	No
Hardware	cisco	1906c_integrated_services_router	-	No
Hardware	cisco	1921_integrated_services_router	-	No
Hardware	cisco	1941_integrated_services_router	-	No
Hardware	cisco	1941w_integrated_services_router	-	No
Hardware	cisco	4000_integrated_services_router	-	No
Hardware	cisco	4221_integrated_services_router	-	No
Hardware	cisco	8101-32fh	-	No
Hardware	cisco	8101-32h	-	No
Hardware	cisco	8102-64h	-	No
Hardware	cisco	8201	-	No
Hardware	cisco	8201-32fh	-	No
Hardware	cisco	8202	-	No
Hardware	cisco	8208	-	No
Hardware	cisco	8212	-	No
Hardware	cisco	8218	-	No
Hardware	cisco	8800_12-slot	-	No
Hardware	cisco	8800_18-slot	-	No
Hardware	cisco	8800_4-slot	-	No
Hardware	cisco	8800_8-slot	-	No
Hardware	cisco	8804	-	No
Hardware	cisco	8808	-	No
Hardware	cisco	8812	-	No
Hardware	cisco	8818	-	No
Hardware	cisco	9800-40	-	No
Hardware	cisco	9800-80	-	No
Hardware	cisco	9800-cl	-	No
Hardware	cisco	9800-l	-	No
Hardware	cisco	asr_1000	-	No
Hardware	cisco	asr_1000-esp100	-	No
Hardware	cisco	asr_1000-esp100-x	-	No
Hardware	cisco	asr_1000-esp200-x	-	No
Hardware	cisco	asr_1001	-	No
Hardware	cisco	asr_1001-hx	-	No
Hardware	cisco	asr_1001-hx_r	-	No
Hardware	cisco	asr_1001-x	-	No
Hardware	cisco	asr_1001-x_r	-	No
Hardware	cisco	asr_1002-hx	-	No
Hardware	cisco	asr_1002-hx_r	-	No
Hardware	cisco	asr_1002-x	-	No
Hardware	cisco	asr_1002-x_r	-	No
Hardware	cisco	asr_1002_fixed_router	-	No
Hardware	cisco	asr_1004	-	No
Hardware	cisco	asr_1006	-	No
Hardware	cisco	asr_1006-x	-	No
Hardware	cisco	asr_1009-x	-	No
Hardware	cisco	asr_1013	-	No
Hardware	cisco	asr_1023	-	No
Hardware	cisco	asr_900	-	No
Hardware	cisco	asr_9000	-	No
Hardware	cisco	asr_9000v	-	No
Hardware	cisco	asr_9001	-	No
Hardware	cisco	asr_9006	-	No
Hardware	cisco	asr_901-12c-f-d	-	No
Hardware	cisco	asr_901-12c-ft-d	-	No
Hardware	cisco	asr_901-4c-f-d	-	No
Hardware	cisco	asr_901-4c-ft-d	-	No
Hardware	cisco	asr_901-6cz-f-a	-	No
Hardware	cisco	asr_901-6cz-f-d	-	No
Hardware	cisco	asr_901-6cz-fs-a	-	No
Hardware	cisco	asr_901-6cz-fs-d	-	No
Hardware	cisco	asr_901-6cz-ft-a	-	No
Hardware	cisco	asr_901-6cz-ft-d	-	No
Hardware	cisco	asr_9010	-	No
Hardware	cisco	asr_9010	-	No
Hardware	cisco	asr_901s-2sg-f-ah	-	No
Hardware	cisco	asr_901s-2sg-f-d	-	No
Hardware	cisco	asr_901s-3sg-f-ah	-	No
Hardware	cisco	asr_901s-3sg-f-d	-	No
Hardware	cisco	asr_901s-4sg-f-d	-	No
Hardware	cisco	asr_902	-	No
Hardware	cisco	asr_902u	-	No
Hardware	cisco	asr_903	-	No
Hardware	cisco	asr_907	-	No
Hardware	cisco	asr_914	-	No
Hardware	cisco	asr_920-10sz-pd	-	No
Hardware	cisco	asr_920-10sz-pd_r	-	No
Hardware	cisco	asr_920-12cz-a	-	No
Hardware	cisco	asr_920-12cz-a_r	-	No
Hardware	cisco	asr_920-12cz-d	-	No
Hardware	cisco	asr_920-12cz-d_r	-	No
Hardware	cisco	asr_920-12sz-im	-	No
Hardware	cisco	asr_920-12sz-im_r	-	No
Hardware	cisco	asr_920-24sz-im	-	No
Hardware	cisco	asr_920-24sz-im_r	-	No
Hardware	cisco	asr_920-24sz-m	-	No
Hardware	cisco	asr_920-24sz-m_r	-	No
Hardware	cisco	asr_920-24tz-m	-	No
Hardware	cisco	asr_920-24tz-m_r	-	No
Hardware	cisco	asr_920-4sz-a	-	No
Hardware	cisco	asr_920-4sz-a_r	-	No
Hardware	cisco	asr_920-4sz-d	-	No
Hardware	cisco	asr_920-4sz-d_r	-	No
Hardware	cisco	asr_920u-12sz-im	-	No
Hardware	cisco	asr_9901	-	No
Hardware	cisco	asr_9902	-	No
Hardware	cisco	asr_9903	-	No
Hardware	cisco	asr_9904	-	No
Hardware	cisco	asr_9906	-	No
Hardware	cisco	asr_9910	-	No
Hardware	cisco	asr_9912	-	No
Hardware	cisco	asr_9920	-	No
Hardware	cisco	asr_9922	-	No
Hardware	cisco	catalyst_3650	-	No
Hardware	cisco	catalyst_3650-12x48fd-e	-	No
Hardware	cisco	catalyst_3650-12x48fd-l	-	No
Hardware	cisco	catalyst_3650-12x48fd-s	-	No
Hardware	cisco	catalyst_3650-12x48uq	-	No
Hardware	cisco	catalyst_3650-12x48uq-e	-	No
Hardware	cisco	catalyst_3650-12x48uq-l	-	No
Hardware	cisco	catalyst_3650-12x48uq-s	-	No
Hardware	cisco	catalyst_3650-12x48ur	-	No
Hardware	cisco	catalyst_3650-12x48ur-e	-	No
Hardware	cisco	catalyst_3650-12x48ur-l	-	No
Hardware	cisco	catalyst_3650-12x48ur-s	-	No
Hardware	cisco	catalyst_3650-12x48uz	-	No
Hardware	cisco	catalyst_3650-12x48uz-e	-	No
Hardware	cisco	catalyst_3650-12x48uz-l	-	No
Hardware	cisco	catalyst_3650-12x48uz-s	-	No
Hardware	cisco	catalyst_3650-24pd	-	No
Hardware	cisco	catalyst_3650-24pd-e	-	No
Hardware	cisco	catalyst_3650-24pd-l	-	No
Hardware	cisco	catalyst_3650-24pd-s	-	No
Hardware	cisco	catalyst_3650-24pdm	-	No
Hardware	cisco	catalyst_3650-24pdm-e	-	No
Hardware	cisco	catalyst_3650-24pdm-l	-	No
Hardware	cisco	catalyst_3650-24pdm-s	-	No
Hardware	cisco	catalyst_3650-24ps-e	-	No
Hardware	cisco	catalyst_3650-24ps-l	-	No
Hardware	cisco	catalyst_3650-24ps-s	-	No
Hardware	cisco	catalyst_3650-24td-e	-	No
Hardware	cisco	catalyst_3650-24td-l	-	No
Hardware	cisco	catalyst_3650-24td-s	-	No
Hardware	cisco	catalyst_3650-24ts-e	-	No
Hardware	cisco	catalyst_3650-24ts-l	-	No
Hardware	cisco	catalyst_3650-24ts-s	-	No
Hardware	cisco	catalyst_3650-48fd-e	-	No
Hardware	cisco	catalyst_3650-48fd-l	-	No
Hardware	cisco	catalyst_3650-48fd-s	-	No
Hardware	cisco	catalyst_3650-48fq	-	No
Hardware	cisco	catalyst_3650-48fq-e	-	No
Hardware	cisco	catalyst_3650-48fq-l	-	No
Hardware	cisco	catalyst_3650-48fq-s	-	No
Hardware	cisco	catalyst_3650-48fqm	-	No
Hardware	cisco	catalyst_3650-48fqm-e	-	No
Hardware	cisco	catalyst_3650-48fqm-l	-	No
Hardware	cisco	catalyst_3650-48fqm-s	-	No
Hardware	cisco	catalyst_3650-48fs-e	-	No
Hardware	cisco	catalyst_3650-48fs-l	-	No
Hardware	cisco	catalyst_3650-48fs-s	-	No
Hardware	cisco	catalyst_3650-48pd-e	-	No
Hardware	cisco	catalyst_3650-48pd-l	-	No
Hardware	cisco	catalyst_3650-48pd-s	-	No
Hardware	cisco	catalyst_3650-48pq-e	-	No
Hardware	cisco	catalyst_3650-48pq-l	-	No
Hardware	cisco	catalyst_3650-48pq-s	-	No
Hardware	cisco	catalyst_3650-48ps-e	-	No
Hardware	cisco	catalyst_3650-48ps-l	-	No
Hardware	cisco	catalyst_3650-48ps-s	-	No
Hardware	cisco	catalyst_3650-48td-e	-	No
Hardware	cisco	catalyst_3650-48td-l	-	No
Hardware	cisco	catalyst_3650-48td-s	-	No
Hardware	cisco	catalyst_3650-48tq-e	-	No
Hardware	cisco	catalyst_3650-48tq-l	-	No
Hardware	cisco	catalyst_3650-48tq-s	-	No
Hardware	cisco	catalyst_3650-48ts-e	-	No
Hardware	cisco	catalyst_3650-48ts-l	-	No
Hardware	cisco	catalyst_3650-48ts-s	-	No
Hardware	cisco	catalyst_3650-8x24pd-e	-	No
Hardware	cisco	catalyst_3650-8x24pd-l	-	No
Hardware	cisco	catalyst_3650-8x24pd-s	-	No
Hardware	cisco	catalyst_3650-8x24uq	-	No
Hardware	cisco	catalyst_3650-8x24uq-e	-	No
Hardware	cisco	catalyst_3650-8x24uq-l	-	No
Hardware	cisco	catalyst_3650-8x24uq-s	-	No
Hardware	cisco	catalyst_3850	-	No
Hardware	cisco	catalyst_3850-12s-e	-	No
Hardware	cisco	catalyst_3850-12s-s	-	No
Hardware	cisco	catalyst_3850-12x48u	-	No
Hardware	cisco	catalyst_3850-12xs-e	-	No
Hardware	cisco	catalyst_3850-12xs-s	-	No
Hardware	cisco	catalyst_3850-16xs-e	-	No
Hardware	cisco	catalyst_3850-16xs-s	-	No
Hardware	cisco	catalyst_3850-24p-e	-	No
Hardware	cisco	catalyst_3850-24p-l	-	No
Hardware	cisco	catalyst_3850-24p-s	-	No
Hardware	cisco	catalyst_3850-24pw-s	-	No
Hardware	cisco	catalyst_3850-24s-e	-	No
Hardware	cisco	catalyst_3850-24s-s	-	No
Hardware	cisco	catalyst_3850-24t-e	-	No
Hardware	cisco	catalyst_3850-24t-l	-	No
Hardware	cisco	catalyst_3850-24t-s	-	No
Hardware	cisco	catalyst_3850-24u	-	No
Hardware	cisco	catalyst_3850-24u-e	-	No
Hardware	cisco	catalyst_3850-24u-l	-	No
Hardware	cisco	catalyst_3850-24u-s	-	No
Hardware	cisco	catalyst_3850-24xs	-	No
Hardware	cisco	catalyst_3850-24xs-e	-	No
Hardware	cisco	catalyst_3850-24xs-s	-	No
Hardware	cisco	catalyst_3850-24xu	-	No
Hardware	cisco	catalyst_3850-24xu-e	-	No
Hardware	cisco	catalyst_3850-24xu-l	-	No
Hardware	cisco	catalyst_3850-24xu-s	-	No
Hardware	cisco	catalyst_3850-32xs-e	-	No
Hardware	cisco	catalyst_3850-32xs-s	-	No
Hardware	cisco	catalyst_3850-48f-e	-	No
Hardware	cisco	catalyst_3850-48f-l	-	No
Hardware	cisco	catalyst_3850-48f-s	-	No
Hardware	cisco	catalyst_3850-48p-e	-	No
Hardware	cisco	catalyst_3850-48p-l	-	No
Hardware	cisco	catalyst_3850-48p-s	-	No
Hardware	cisco	catalyst_3850-48pw-s	-	No
Hardware	cisco	catalyst_3850-48t-e	-	No
Hardware	cisco	catalyst_3850-48t-l	-	No
Hardware	cisco	catalyst_3850-48t-s	-	No
Hardware	cisco	catalyst_3850-48u	-	No
Hardware	cisco	catalyst_3850-48u-e	-	No
Hardware	cisco	catalyst_3850-48u-l	-	No
Hardware	cisco	catalyst_3850-48u-s	-	No
Hardware	cisco	catalyst_3850-48xs	-	No
Hardware	cisco	catalyst_3850-48xs-e	-	No
Hardware	cisco	catalyst_3850-48xs-f-e	-	No
Hardware	cisco	catalyst_3850-48xs-f-s	-	No
Hardware	cisco	catalyst_3850-48xs-s	-	No
Hardware	cisco	catalyst_3850-nm-2-40g	-	No
Hardware	cisco	catalyst_3850-nm-8-10g	-	No
Hardware	cisco	catalyst_8200	-	No
Hardware	cisco	catalyst_8300	-	No
Hardware	cisco	catalyst_8300-1n1s-4t2x	-	No
Hardware	cisco	catalyst_8300-1n1s-6t	-	No
Hardware	cisco	catalyst_8300-2n2s-4t2x	-	No
Hardware	cisco	catalyst_8300-2n2s-6t	-	No
Hardware	cisco	catalyst_8500	-	No
Hardware	cisco	catalyst_8500-4qc	-	No
Hardware	cisco	catalyst_8500l	-	No
Hardware	cisco	catalyst_8510csr	-	No
Hardware	cisco	catalyst_8510msr	-	No
Hardware	cisco	catalyst_8540csr	-	No
Hardware	cisco	catalyst_8540msr	-	No
Hardware	cisco	catalyst_9200	-	No
Hardware	cisco	catalyst_9200cx	-	No
Hardware	cisco	catalyst_9200l	-	No
Hardware	cisco	catalyst_9300	-	No
Hardware	cisco	catalyst_9300-24p-a	-	No
Hardware	cisco	catalyst_9300-24p-e	-	No
Hardware	cisco	catalyst_9300-24s-a	-	No
Hardware	cisco	catalyst_9300-24s-e	-	No
Hardware	cisco	catalyst_9300-24t-a	-	No
Hardware	cisco	catalyst_9300-24t-e	-	No
Hardware	cisco	catalyst_9300-24u-a	-	No
Hardware	cisco	catalyst_9300-24u-e	-	No
Hardware	cisco	catalyst_9300-24ux-a	-	No
Hardware	cisco	catalyst_9300-24ux-e	-	No
Hardware	cisco	catalyst_9300-48p-a	-	No
Hardware	cisco	catalyst_9300-48p-e	-	No
Hardware	cisco	catalyst_9300-48s-a	-	No
Hardware	cisco	catalyst_9300-48s-e	-	No
Hardware	cisco	catalyst_9300-48t-a	-	No
Hardware	cisco	catalyst_9300-48t-e	-	No
Hardware	cisco	catalyst_9300-48u-a	-	No
Hardware	cisco	catalyst_9300-48u-e	-	No
Hardware	cisco	catalyst_9300-48un-a	-	No
Hardware	cisco	catalyst_9300-48un-e	-	No
Hardware	cisco	catalyst_9300-48uxm-a	-	No
Hardware	cisco	catalyst_9300-48uxm-e	-	No
Hardware	cisco	catalyst_9300l	-	No
Hardware	cisco	catalyst_9300l-24p-4g-a	-	No
Hardware	cisco	catalyst_9300l-24p-4g-e	-	No
Hardware	cisco	catalyst_9300l-24p-4x-a	-	No
Hardware	cisco	catalyst_9300l-24p-4x-e	-	No
Hardware	cisco	catalyst_9300l-24t-4g-a	-	No
Hardware	cisco	catalyst_9300l-24t-4g-e	-	No
Hardware	cisco	catalyst_9300l-24t-4x-a	-	No
Hardware	cisco	catalyst_9300l-24t-4x-e	-	No
Hardware	cisco	catalyst_9300l-48p-4g-a	-	No
Hardware	cisco	catalyst_9300l-48p-4g-e	-	No
Hardware	cisco	catalyst_9300l-48p-4x-a	-	No
Hardware	cisco	catalyst_9300l-48p-4x-e	-	No
Hardware	cisco	catalyst_9300l-48t-4g-a	-	No
Hardware	cisco	catalyst_9300l-48t-4g-e	-	No
Hardware	cisco	catalyst_9300l-48t-4x-a	-	No
Hardware	cisco	catalyst_9300l-48t-4x-e	-	No
Hardware	cisco	catalyst_9300l_stack	-	No
Hardware	cisco	catalyst_9300lm	-	No
Hardware	cisco	catalyst_9300x	-	No
Hardware	cisco	catalyst_9500	-	No
Hardware	cisco	catalyst_9500h	-	No
Hardware	cisco	catalyst_9600	-	No
Hardware	cisco	catalyst_9600_supervisor_engine-1	-	No
Hardware	cisco	catalyst_9600x	-	No
Hardware	cisco	catalyst_9800	-	No
Hardware	cisco	catalyst_9800-40	-	No
Hardware	cisco	catalyst_9800-40_wireless_controller	-	No
Hardware	cisco	catalyst_9800-80	-	No
Hardware	cisco	catalyst_9800-80_wireless_controller	-	No
Hardware	cisco	catalyst_9800-cl	-	No
Hardware	cisco	catalyst_9800-l	-	No
Hardware	cisco	catalyst_9800-l-c	-	No
Hardware	cisco	catalyst_9800-l-f	-	No
Hardware	cisco	catalyst_9800_embedded_wireless_controller	-	No
Hardware	cisco	catalyst_ie3200_rugged_switch	-	No
Hardware	cisco	catalyst_ie3300_rugged_switch	-	No

References

http://www.securityfocus.com/bid/101039 Broken Link, Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1039449 Broken Link, Third Party Advisory, VDB Entry ([email protected])
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-nat Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/101039 Broken Link, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1039449 Broken Link, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-nat Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-12231 (134c704f-9b21-4f2e-91b3-4a467353bcc0)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.