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CVE-2017-12240: Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability

Critical · CVSS 9.8 (CVSS 3.1)KEV known exploitedEPSS 13.8%, 96th percentilePublished Updated Assigner: cisco

In CISA’s Known Exploited Vulnerabilities catalog: Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability.

Added , federal remediation due . Known ransomware use: Unknown.

Required action: Apply updates per vendor instructions.

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.

Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · CWE-20

Status incidents that name it

No tracked status incident names this CVE.

Affected vendors and products

Cisco IOS and IOS XE

References

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