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CVE-2017-12240
CRITICALCISA KEV9.8
Description
The DHCP relay subsystem of Cisco IOS 12.2 through 15.6 and Cisco IOS XE Software contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code and gain full control of an affected system. The attacker could also cause an affected system to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to a buffer overflow condition in the DHCP relay subsystem of the affected software. An attacker could exploit this vulnerability by sending a crafted DHCP Version 4 (DHCPv4) packet to an affected system. A successful exploit could allow the attacker to execute arbitrary code and gain full control of the affected system or cause the affected system to reload, resulting in a DoS condition. Cisco Bug IDs: CSCsm45390, CSCuw77959.
CVE Details
CVSS v3.1 Score9.8
SeverityCRITICAL
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
Published9/29/2017
Last Modified4/21/2026
Sourcekev
Honeypot Sightings0
CISA KEV
VendorCisco
ProductIOS and IOS XE Software
Vulnerability NameCisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability
KEV Date Added2022-03-03
Remediation Due Date2022-03-24
Ransomware UseUnknown
Affected Products
cisco:1000_integrated_services_routercisco:1100-4g_integrated_services_routercisco:1100-4gltegb_integrated_services_routercisco:1100-4gltena_integrated_services_routercisco:1100-4p_integrated_services_routercisco:1100-6g_integrated_services_routercisco:1100-8p_integrated_services_routercisco:1100-lte_integrated_services_routercisco:1100_integrated_services_routercisco:1101-4p_integrated_services_routercisco:1101_integrated_services_routercisco:1109-2p_integrated_services_routercisco:1109-4p_integrated_services_routercisco:1109_integrated_services_routercisco:1111x-8p_integrated_services_routercisco:1111x_integrated_services_routercisco:111x_integrated_services_routercisco:1120_integrated_services_routercisco:1131_integrated_services_routercisco:1160_integrated_services_routercisco:1801_integrated_service_routercisco:1802_integrated_service_routercisco:1803_integrated_service_routercisco:1811_integrated_service_routercisco:1812_integrated_service_routercisco:1841_integrated_service_routercisco:1861_integrated_service_routercisco:1905_integrated_services_routercisco:1906c_integrated_services_routercisco:1921_integrated_services_routercisco:1941_integrated_services_routercisco:1941w_integrated_services_routercisco:4000_integrated_services_routercisco:4221_integrated_services_routercisco:422_integrated_services_routercisco:8101-32fhcisco:8101-32hcisco:8102-64hcisco:8201cisco:8201-32fhcisco:8202cisco:8208cisco:8212cisco:8218cisco:8800_12-slotcisco:8800_18-slotcisco:8800_4-slotcisco:8800_8-slotcisco:8804cisco:8808cisco:8812cisco:8818cisco:8831cisco:9800-40cisco:9800-80cisco:9800-clcisco:9800-lcisco:asr_1000cisco:asr_1000-esp100cisco:asr_1000-esp100-xcisco:asr_1000-esp200-xcisco:asr_1000-xcisco:asr_1001cisco:asr_1001-hxcisco:asr_1001-hx_rcisco:asr_1001-xcisco:asr_1001-x_rcisco:asr_1002cisco:asr_1002-hxcisco:asr_1002-hx_rcisco:asr_1002-xcisco:asr_1002-x_rcisco:asr_1004cisco:asr_1006cisco:asr_1006-xcisco:asr_1009-xcisco:asr_1013cisco:asr_1023cisco:asr_900cisco:asr_9000cisco:asr_9000vcisco:asr_9001cisco:asr_9006cisco:asr_901-12c-f-dcisco:asr_901-12c-ft-dcisco:asr_901-4c-f-dcisco:asr_901-4c-ft-dcisco:asr_901-6cz-f-acisco:asr_901-6cz-f-dcisco:asr_901-6cz-fs-acisco:asr_901-6cz-fs-dcisco:asr_901-6cz-ft-acisco:asr_901-6cz-ft-dcisco:asr_9010cisco:asr_901s-2sg-f-ahcisco:asr_901s-2sg-f-dcisco:asr_901s-3sg-f-ahcisco:asr_901s-3sg-f-dcisco:asr_901s-4sg-f-dcisco:asr_902cisco:asr_902ucisco:asr_903cisco:asr_907cisco:asr_914cisco:asr_920-10sz-pdcisco:asr_920-10sz-pd_rcisco:asr_920-10sz-pd_routercisco:asr_920-12cz-acisco:asr_920-12cz-a_rcisco:asr_920-12cz-a_routercisco:asr_920-12cz-dcisco:asr_920-12cz-d_rcisco:asr_920-12cz-d_routercisco:asr_920-12sz-imcisco:asr_920-12sz-im_rcisco:asr_920-12sz-im_routercisco:asr_920-24sz-imcisco:asr_920-24sz-im_rcisco:asr_920-24sz-im_routercisco:asr_920-24sz-mcisco:asr_920-24sz-m_rcisco:asr_920-24sz-m_routercisco:asr_920-24tz-mcisco:asr_920-24tz-m_rcisco:asr_920-24tz-m_routercisco:asr_920-4sz-acisco:asr_920-4sz-a_rcisco:asr_920-4sz-a_routercisco:asr_920-4sz-dcisco:asr_920-4sz-d_rcisco:asr_920-4sz-d_routercisco:asr_920u-12sz-imcisco:asr_9901cisco:asr_9902cisco:asr_9903cisco:asr_9904cisco:asr_9906cisco:asr_9910cisco:asr_9912cisco:asr_9920cisco:asr_9922cisco:catalyst_3650cisco:catalyst_3650-12x48fd-ecisco:catalyst_3650-12x48fd-lcisco:catalyst_3650-12x48fd-scisco:catalyst_3650-12x48uqcisco:catalyst_3650-12x48uq-ecisco:catalyst_3650-12x48uq-lcisco:catalyst_3650-12x48uq-scisco:catalyst_3650-12x48urcisco:catalyst_3650-12x48ur-ecisco:catalyst_3650-12x48ur-lcisco:catalyst_3650-12x48ur-scisco:catalyst_3650-12x48uzcisco:catalyst_3650-12x48uz-ecisco:catalyst_3650-12x48uz-lcisco:catalyst_3650-12x48uz-scisco:catalyst_3650-24pdcisco:catalyst_3650-24pd-ecisco:catalyst_3650-24pd-lcisco:catalyst_3650-24pd-scisco:catalyst_3650-24pdmcisco:catalyst_3650-24pdm-ecisco:catalyst_3650-24pdm-lcisco:catalyst_3650-24pdm-scisco:catalyst_3650-24ps-ecisco:catalyst_3650-24ps-lcisco:catalyst_3650-24ps-scisco:catalyst_3650-24td-ecisco:catalyst_3650-24td-lcisco:catalyst_3650-24td-scisco:catalyst_3650-24ts-ecisco:catalyst_3650-24ts-lcisco:catalyst_3650-24ts-scisco:catalyst_3650-48fd-ecisco:catalyst_3650-48fd-lcisco:catalyst_3650-48fd-scisco:catalyst_3650-48fqcisco:catalyst_3650-48fq-ecisco:catalyst_3650-48fq-lcisco:catalyst_3650-48fq-scisco:catalyst_3650-48fqmcisco:catalyst_3650-48fqm-ecisco:catalyst_3650-48fqm-lcisco:catalyst_3650-48fqm-scisco:catalyst_3650-48fs-ecisco:catalyst_3650-48fs-lcisco:catalyst_3650-48fs-scisco:catalyst_3650-48pd-ecisco:catalyst_3650-48pd-lcisco:catalyst_3650-48pd-scisco:catalyst_3650-48pq-ecisco:catalyst_3650-48pq-lcisco:catalyst_3650-48pq-scisco:catalyst_3650-48ps-ecisco:catalyst_3650-48ps-lcisco:catalyst_3650-48ps-scisco:catalyst_3650-48td-ecisco:catalyst_3650-48td-lcisco:catalyst_3650-48td-scisco:catalyst_3650-48tq-ecisco:catalyst_3650-48tq-lcisco:catalyst_3650-48tq-scisco:catalyst_3650-48ts-ecisco:catalyst_3650-48ts-lcisco:catalyst_3650-48ts-scisco:catalyst_3650-8x24pd-ecisco:catalyst_3650-8x24pd-lcisco:catalyst_3650-8x24pd-scisco:catalyst_3650-8x24uqcisco:catalyst_3650-8x24uq-ecisco:catalyst_3650-8x24uq-lcisco:catalyst_3650-8x24uq-scisco:catalyst_3850cisco:catalyst_3850-12s-ecisco:catalyst_3850-12s-scisco:catalyst_3850-12x48ucisco:catalyst_3850-12xs-ecisco:catalyst_3850-12xs-scisco:catalyst_3850-16xs-ecisco:catalyst_3850-16xs-scisco:catalyst_3850-24p-ecisco:catalyst_3850-24p-lcisco:catalyst_3850-24p-scisco:catalyst_3850-24pw-scisco:catalyst_3850-24s-ecisco:catalyst_3850-24s-scisco:catalyst_3850-24t-ecisco:catalyst_3850-24t-lcisco:catalyst_3850-24t-scisco:catalyst_3850-24ucisco:catalyst_3850-24u-ecisco:catalyst_3850-24u-lcisco:catalyst_3850-24u-scisco:catalyst_3850-24xscisco:catalyst_3850-24xs-ecisco:catalyst_3850-24xs-scisco:catalyst_3850-24xucisco:catalyst_3850-24xu-ecisco:catalyst_3850-24xu-lcisco:catalyst_3850-24xu-scisco:catalyst_3850-32xs-ecisco:catalyst_3850-32xs-scisco:catalyst_3850-48f-ecisco:catalyst_3850-48f-lcisco:catalyst_3850-48f-scisco:catalyst_3850-48p-ecisco:catalyst_3850-48p-lcisco:catalyst_3850-48p-scisco:catalyst_3850-48pw-scisco:catalyst_3850-48t-ecisco:catalyst_3850-48t-lcisco:catalyst_3850-48t-scisco:catalyst_3850-48ucisco:catalyst_3850-48u-ecisco:catalyst_3850-48u-lcisco:catalyst_3850-48u-scisco:catalyst_3850-48xscisco:catalyst_3850-48xs-ecisco:catalyst_3850-48xs-f-ecisco:catalyst_3850-48xs-f-scisco:catalyst_3850-48xs-scisco:catalyst_3850-nm-2-40gcisco:catalyst_3850-nm-8-10gcisco:ios
Weaknesses (CWE)
CWE-20CWE-119
References
http://www.securityfocus.com/bid/101034(psirt@cisco.com)
http://www.securitytracker.com/id/1039445(psirt@cisco.com)
https://quickview.cloudapps.cisco.com/quickview/bug/CSCsm45390(psirt@cisco.com)
https://quickview.cloudapps.cisco.com/quickview/bug/CSCuw77959(psirt@cisco.com)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-dhcp(psirt@cisco.com)
http://www.securityfocus.com/bid/101034(af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1039445(af854a3a-2127-422b-91ae-364da2661108)
https://quickview.cloudapps.cisco.com/quickview/bug/CSCsm45390(af854a3a-2127-422b-91ae-364da2661108)
https://quickview.cloudapps.cisco.com/quickview/bug/CSCuw77959(af854a3a-2127-422b-91ae-364da2661108)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-dhcp(af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-12240(134c704f-9b21-4f2e-91b3-4a467353bcc0)
IOC Correlations
No correlations recorded
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