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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCisco 1000 Integrated Services Router
HWCiscoall versionsCisco 1100 4g Integrated Services Router
HWCiscoall versionsCisco 1100 4gltegb Integrated Services Router
HWCiscoall versionsCisco 1100 4gltena Integrated Services Router
HWCiscoall versionsCisco 1100 4p Integrated Services Router
HWCiscoall versionsCisco 1100 6g Integrated Services Router
HWCiscoall versionsCisco 1100 8p Integrated Services Router
HWCiscoall versionsCisco 1100 Integrated Services Router
HWCiscoall versionsCisco 1100 Lte Integrated Services Router
HWCiscoall versionsCisco 1101 4p Integrated Services Router
HWCiscoall versionsCisco 1101 Integrated Services Router
HWCiscoall versionsCisco 1109 2p Integrated Services Router
HWCiscoall versionsCisco 1109 4p Integrated Services Router
HWCiscoall versionsCisco 1109 Integrated Services Router
HWCiscoall versionsCisco 1111x 8p Integrated Services Router
HWCiscoall versionsCisco 1111x Integrated Services Router
HWCiscoall versionsCisco 111x Integrated Services Router
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HWCiscoall versionsCisco 1160 Integrated Services Router
HWCiscoall versionsCisco 1801 Integrated Service Router
HWCiscoall versionsCisco 1802 Integrated Service Router
HWCiscoall versionsCisco 1803 Integrated Service Router
HWCiscoall versionsCisco 1811 Integrated Service Router
HWCiscoall versionsCisco 1812 Integrated Service Router
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CISA KEV — detailsi
- Vendori
- Cisco ↗
- Producti
- IOS and IOS XE Software
- Added to KEVi
- March 3, 2022
- Remediation deadline (US Federal)i
- March 24, 2022(overdue)
Apply updates per vendor instructions.
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.
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