CVE-2017-12231
CVE-2017-12231
In short
A flaw in how Cisco routers translate H.323 phone call setup messages can be exploited by sending a specially crafted packet, causing the router to crash and stop working temporarily. This affects routers used in networks that handle voice over IP communications.
Technical detail
The vulnerability exists in the NAT ALG implementation for H.323 RAS protocol in Cisco IOS 12.4–15.6. An unauthenticated remote attacker can send a malformed H.323 RAS packet via IPv4 to trigger improper message translation, resulting in device crash and reload (DoS). The NAT ALG for H.323 is enabled by default on affected devices.
Summary generated and translated by AI from the official description.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
n/a · Cisco IOSWant to know if your infrastructure is exposed to this?
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