CVE-2017-12240
CRITICAL
9.8
CVSS Score
Published: September 28, 2017 at 07:00 AM UTC
Updated: June 17, 2026 at 01:02 AM UTC
266 products affected across 1 vendorIOSAsr 1002-xAsr 1006
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Severity
CRITICAL9.8
Exploitation
CISA KEV
Exploit prediction
EPSS 14%
SSVC
Active
Actively Exploited
CISA Known Exploited Vulnerabilities (KEV) Catalog
EPSS Score13.8%
EPSS (Exploit Prediction Scoring System) estimates a 13.8% chance this CVE is exploited in the wild within the next 30 days — higher than 96% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.
The Dynamic Host Configuration Protocol (DHCP) relay subsystem of Cisco IOS 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.
Required Action
Apply updates per vendor instructions.
Ransomware Use
Unknown
Added to KEV
Mar 3, 2022
Remediation Due
Mar 24, 2022
1678 days overdue
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
12.2 ≤ v ≤ 15.6
cisco-1000-integrated-services-router (environment) · cisco-1100-4g-integrated-services-router (environment) · cisco-1100-4gltegb-integrated-services-router (environment) · cisco-1100-4gltena-integrated-services-router (environment) · cisco-1100-4p-integrated-services-router (environment) · cisco-1100-6g-integrated-services-router (environment) · cisco-1100-8p-integrated-services-router (environment) · cisco-1100-integrated-services-router (environment) · cisco-1100-lte-integrated-services-router (environment) · cisco-1101-4p-integrated-services-router (environment) · cisco-1101-integrated-services-router (environment) · cisco-1109-2p-integrated-services-router (environment) · cisco-1109-4p-integrated-services-router (environment) · cisco-1109-integrated-services-router (environment) · cisco-1111x-8p-integrated-services-router (environment) · cisco-1111x-integrated-services-router (environment) · cisco-111x-integrated-services-router (environment) · cisco-1120-integrated-services-router (environment) · cisco-1131-integrated-services-router (environment) · cisco-1160-integrated-services-router (environment) · cisco-1801-integrated-service-router (environment) · cisco-1802-integrated-service-router (environment) · cisco-1803-integrated-service-router (environment) · cisco-1811-integrated-service-router (environment) · cisco-1812-integrated-service-router (environment) · cisco-1841-integrated-service-router (environment) · cisco-1861-integrated-service-router (environment) · cisco-1905-integrated-services-router (environment) · cisco-1906c-integrated-services-router (environment) · cisco-1921-integrated-services-router (environment) · cisco-1941-integrated-services-router (environment) · cisco-1941w-integrated-services-router (environment) · cisco-4000-integrated-services-router (environment) · cisco-422-integrated-services-router (environment) · cisco-4221-integrated-services-router (environment) · cisco-8101-32fh (environment) · cisco-8101-32h (environment) · cisco-8102-64h (environment) · cisco-8201 (environment) · cisco-8201-32fh (environment) · cisco-8202 (environment) · cisco-8208 (environment) · cisco-8212 (environment) · cisco-8218 (environment) · cisco-8800-12-slot (environment) · cisco-8800-18-slot (environment) · cisco-8800-4-slot (environment) · cisco-8800-8-slot (environment) · cisco-8804 (environment) · cisco-8808 (environment) · cisco-8812 (environment) · cisco-8818 (environment) · cisco-8831 (environment) · cisco-9800-40 (environment) · cisco-9800-80 (environment) · cisco-9800-cl (environment) · cisco-9800-l (environment) · cisco-asr-1000 (environment) · cisco-asr-1000-esp100 (environment) · cisco-asr-1000-esp100-x (environment) · cisco-asr-1000-esp200-x (environment) · cisco-asr-1000-x (environment) · cisco-asr-1001 (environment) · cisco-asr-1001-hx (environment) · cisco-asr-1001-hx-r (environment) · cisco-asr-1001-x (environment) · cisco-asr-1001-x-r (environment) · cisco-asr-1002 (environment) · cisco-asr-1002-hx (environment) · cisco-asr-1002-hx-r (environment) · cisco-asr-1002-x (environment) · cisco-asr-1002-x-r (environment) · cisco-asr-1004 (environment) · cisco-asr-1006 (environment) · cisco-asr-1006-x (environment) · cisco-asr-1009-x (environment) · cisco-asr-1013 (environment) · cisco-asr-1023 (environment) · cisco-asr-900 (environment) · cisco-asr-9000 (environment) · cisco-asr-9000v (environment) · cisco-asr-9001 (environment) · cisco-asr-9006 (environment) · cisco-asr-901-12c-f-d (environment) · cisco-asr-901-12c-ft-d (environment) · cisco-asr-901-4c-f-d (environment) · cisco-asr-901-4c-ft-d (environment) · cisco-asr-901-6cz-f-a (environment) · cisco-asr-901-6cz-f-d (environment) · cisco-asr-901-6cz-fs-a (environment) · cisco-asr-901-6cz-fs-d (environment) · cisco-asr-901-6cz-ft-a (environment) · cisco-asr-901-6cz-ft-d (environment) · cisco-asr-9010 (environment) · cisco-asr-901s-2sg-f-ah (environment) · cisco-asr-901s-2sg-f-d (environment) · cisco-asr-901s-3sg-f-ah (environment) · cisco-asr-901s-3sg-f-d (environment) · cisco-asr-901s-4sg-f-d (environment) · cisco-asr-902 (environment) · cisco-asr-902u (environment) · cisco-asr-903 (environment) · cisco-asr-907 (environment) · cisco-asr-914 (environment) · cisco-asr-920-10sz-pd (environment) · cisco-asr-920-10sz-pd-r (environment) · cisco-asr-920-10sz-pd-router (environment) · cisco-asr-920-12cz-a (environment) · cisco-asr-920-12cz-a-r (environment) · cisco-asr-920-12cz-a-router (environment) · cisco-asr-920-12cz-d (environment) · cisco-asr-920-12cz-d-r (environment) · cisco-asr-920-12cz-d-router (environment) · cisco-asr-920-12sz-im (environment) · cisco-asr-920-12sz-im-r (environment) · cisco-asr-920-12sz-im-router (environment) · cisco-asr-920-24sz-im (environment) · cisco-asr-920-24sz-im-r (environment) · cisco-asr-920-24sz-im-router (environment) · cisco-asr-920-24sz-m (environment) · cisco-asr-920-24sz-m-r (environment) · cisco-asr-920-24sz-m-router (environment) · cisco-asr-920-24tz-m (environment) · cisco-asr-920-24tz-m-r (environment) · cisco-asr-920-24tz-m-router (environment) · cisco-asr-920-4sz-a (environment) · cisco-asr-920-4sz-a-r (environment) · cisco-asr-920-4sz-a-router (environment) · cisco-asr-920-4sz-d (environment) · cisco-asr-920-4sz-d-r (environment) · cisco-asr-920-4sz-d-router (environment) · cisco-asr-920u-12sz-im (environment) · cisco-asr-9901 (environment) · cisco-asr-9902 (environment) · cisco-asr-9903 (environment) · cisco-asr-9904 (environment) · cisco-asr-9906 (environment) · cisco-asr-9910 (environment) · cisco-asr-9912 (environment) · cisco-asr-9920 (environment) · cisco-asr-9922 (environment) · cisco-catalyst-3650 (environment) · cisco-catalyst-3650-12x48fd-e (environment) · cisco-catalyst-3650-12x48fd-l (environment) · cisco-catalyst-3650-12x48fd-s (environment) · cisco-catalyst-3650-12x48uq (environment) · cisco-catalyst-3650-12x48uq-e (environment) · cisco-catalyst-3650-12x48uq-l (environment) · cisco-catalyst-3650-12x48uq-s (environment) · cisco-catalyst-3650-12x48ur (environment) · cisco-catalyst-3650-12x48ur-e (environment) · cisco-catalyst-3650-12x48ur-l (environment) · cisco-catalyst-3650-12x48ur-s (environment) · cisco-catalyst-3650-12x48uz (environment) · cisco-catalyst-3650-12x48uz-e (environment) · cisco-catalyst-3650-12x48uz-l (environment) · cisco-catalyst-3650-12x48uz-s (environment) · cisco-catalyst-3650-24pd (environment) · cisco-catalyst-3650-24pd-e (environment) · cisco-catalyst-3650-24pd-l (environment) · cisco-catalyst-3650-24pd-s (environment) · cisco-catalyst-3650-24pdm (environment) · cisco-catalyst-3650-24pdm-e (environment) · cisco-catalyst-3650-24pdm-l (environment) · cisco-catalyst-3650-24pdm-s (environment) · cisco-catalyst-3650-24ps-e (environment) · cisco-catalyst-3650-24ps-l (environment) · cisco-catalyst-3650-24ps-s (environment) · cisco-catalyst-3650-24td-e (environment) · cisco-catalyst-3650-24td-l (environment) · cisco-catalyst-3650-24td-s (environment) · cisco-catalyst-3650-24ts-e (environment) · cisco-catalyst-3650-24ts-l (environment) · cisco-catalyst-3650-24ts-s (environment) · cisco-catalyst-3650-48fd-e (environment) · cisco-catalyst-3650-48fd-l (environment) · cisco-catalyst-3650-48fd-s (environment) · cisco-catalyst-3650-48fq (environment) · cisco-catalyst-3650-48fq-e (environment) · cisco-catalyst-3650-48fq-l (environment) · cisco-catalyst-3650-48fq-s (environment) · cisco-catalyst-3650-48fqm (environment) · cisco-catalyst-3650-48fqm-e (environment) · cisco-catalyst-3650-48fqm-l (environment) · cisco-catalyst-3650-48fqm-s (environment) · cisco-catalyst-3650-48fs-e (environment) · cisco-catalyst-3650-48fs-l (environment) · cisco-catalyst-3650-48fs-s (environment) · cisco-catalyst-3650-48pd-e (environment) · cisco-catalyst-3650-48pd-l (environment) · cisco-catalyst-3650-48pd-s (environment) · cisco-catalyst-3650-48pq-e (environment) · cisco-catalyst-3650-48pq-l (environment) · cisco-catalyst-3650-48pq-s (environment) · cisco-catalyst-3650-48ps-e (environment) · cisco-catalyst-3650-48ps-l (environment) · cisco-catalyst-3650-48ps-s (environment) · cisco-catalyst-3650-48td-e (environment) · cisco-catalyst-3650-48td-l (environment) · cisco-catalyst-3650-48td-s (environment) · cisco-catalyst-3650-48tq-e (environment) · cisco-catalyst-3650-48tq-l (environment) · cisco-catalyst-3650-48tq-s (environment) · cisco-catalyst-3650-48ts-e (environment) · cisco-catalyst-3650-48ts-l (environment) · cisco-catalyst-3650-48ts-s (environment) · cisco-catalyst-3650-8x24pd-e (environment) · cisco-catalyst-3650-8x24pd-l (environment) · cisco-catalyst-3650-8x24pd-s (environment) · cisco-catalyst-3650-8x24uq (environment) · cisco-catalyst-3650-8x24uq-e (environment) · cisco-catalyst-3650-8x24uq-l (environment) · cisco-catalyst-3650-8x24uq-s (environment) · cisco-catalyst-3850 (environment) · cisco-catalyst-3850-12s-e (environment) · cisco-catalyst-3850-12s-s (environment) · cisco-catalyst-3850-12x48u (environment) · cisco-catalyst-3850-12xs-e (environment) · cisco-catalyst-3850-12xs-s (environment) · cisco-catalyst-3850-16xs-e (environment) · cisco-catalyst-3850-16xs-s (environment) · cisco-catalyst-3850-24p-e (environment) · cisco-catalyst-3850-24p-l (environment) · cisco-catalyst-3850-24p-s (environment) · cisco-catalyst-3850-24pw-s (environment) · cisco-catalyst-3850-24s-e (environment) · cisco-catalyst-3850-24s-s (environment) · cisco-catalyst-3850-24t-e (environment) · cisco-catalyst-3850-24t-l (environment) · cisco-catalyst-3850-24t-s (environment) · cisco-catalyst-3850-24u (environment) · cisco-catalyst-3850-24u-e (environment) · cisco-catalyst-3850-24u-l (environment) · cisco-catalyst-3850-24u-s (environment) · cisco-catalyst-3850-24xs (environment) · cisco-catalyst-3850-24xs-e (environment) · cisco-catalyst-3850-24xs-s (environment) · cisco-catalyst-3850-24xu (environment) · cisco-catalyst-3850-24xu-e (environment) · cisco-catalyst-3850-24xu-l (environment) · cisco-catalyst-3850-24xu-s (environment) · cisco-catalyst-3850-32xs-e (environment) · cisco-catalyst-3850-32xs-s (environment) · cisco-catalyst-3850-48f-e (environment) · cisco-catalyst-3850-48f-l (environment) · cisco-catalyst-3850-48f-s (environment) · cisco-catalyst-3850-48p-e (environment) · cisco-catalyst-3850-48p-l (environment) · cisco-catalyst-3850-48p-s (environment) · cisco-catalyst-3850-48pw-s (environment) · cisco-catalyst-3850-48t-e (environment) · cisco-catalyst-3850-48t-l (environment) · cisco-catalyst-3850-48t-s (environment) · cisco-catalyst-3850-48u (environment) · cisco-catalyst-3850-48u-e (environment) · cisco-catalyst-3850-48u-l (environment) · cisco-catalyst-3850-48u-s (environment) · cisco-catalyst-3850-48xs (environment) · cisco-catalyst-3850-48xs-e (environment) · cisco-catalyst-3850-48xs-f-e (environment) · cisco-catalyst-3850-48xs-f-s (environment) · cisco-catalyst-3850-48xs-s (environment) · cisco-catalyst-3850-nm-2-40g (environment) · cisco-catalyst-3850-nm-8-10g (environment)
All versions
All versions
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Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (6)
VDB Entryx_refsource_BIDBroken LinkThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/101034VDB Entryx_refsource_SECTRACKBroken LinkThird Party Advisory
Source: [email protected]
http://www.securitytracker.com/id/1039445x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://quickview.cloudapps.cisco.com/quickview/bug/CSCsm45390x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://quickview.cloudapps.cisco.com/quickview/bug/CSCuw77959x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-dhcpUS Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-12240SSVC — Action Prioritization
SSVCActiveAutomatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
9.8CRITICALCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusANALYZED
CWE
CWE-20CWE-119
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