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Note: The SD-WAN feature is not enabled by default.įor information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory. ASR 1000 Series Aggregation Services Routers.1000 Series Integrated Services Routers (ISRs).
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This vulnerability affects the following Cisco products if they are running a vulnerable release of Cisco IOS XE SD-WAN Software and have the SD-WAN feature enabled: For a complete list of the advisories and links to them, see Cisco Event Response: September 2021 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication. This advisory is part of the September 2021 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. This advisory is available at the following link: There are no workarounds that address this vulnerability.
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A successful exploit could allow the attacker to cause a buffer overflow and possibly execute arbitrary commands with root-level privileges, or cause the device to reload, which could result in a denial of service condition.Ĭisco has released software updates that address this vulnerability. An attacker could exploit this vulnerability by sending crafted traffic to the device. This vulnerability is due to insufficient bounds checking when an affected device processes traffic. A vulnerability in the vDaemon process in Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device.