CVE-2021-34705
published 2021-09-23CVE-2021-34705: A vulnerability in the Voice Telephony Service Provider (VTSP) service of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote…
medium5.3CVSS 3.1
AVNACLPRNUINSUCNILAN
A vulnerability in the Voice Telephony Service Provider (VTSP) service of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass configured destination patterns and dial arbitrary numbers. This vulnerability is due to insufficient validation of dial strings at Foreign Exchange Office (FXO) interfaces. An attacker could exploit this vulnerability by sending a malformed dial string to an affected device via either the ISDN protocol or SIP. A successful exploit could allow the attacker to conduct toll fraud, resulting in unexpected financial impact to affected customers.
Affected
1722 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
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| cisco | cisco_ios | — | — |
| cisco | ios | — | — |
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