CVE-2017-6631
HighSummary
A vulnerability in the HTTP remote procedure call (RPC) service of Cisco set-top box receivers for Yes could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability exists due to the firmware's failure to handle certain XML values.
Risk Assessment
An attacker could exploit this vulnerability to restart the affected device, resulting in a DoS condition. While devices have been updated, the risk remains for those that are not kept up to date.
Recommendation
It is recommended that administrators ensure all devices are updated to the latest firmware version to minimize the risk of attack.
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Original NVD description (English source)
A vulnerability in the HTTP remote procedure call (RPC) service of set-top box (STB) receivers manufactured by Cisco for Yes could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability exists because the firmware of an affected device fails to handle certain XML values that are passed to the HTTP RPC service listening on the local subnet of the device. An attacker could exploit this vulnerability by submitting a malformed request to an affected device. A successful attack could cause the affected device to restart, resulting in a DoS condition. Yes has updated the affected devices with firmware that addresses this vulnerability. Customers are not required to take action. Vulnerable Products: This vulnerability affects YesMaxTotal, YesMax HD, and YesQuattro STB devices. Cisco Bug IDs: CSCvd08812.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

