CVE-2021-34705
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
23/09/2021
Last modified:
07/02/2024
Description
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.
Impact
Base Score 3.x
5.30
Severity 3.x
MEDIUM
Base Score 2.0
4.30
Severity 2.0
MEDIUM
Vulnerable products and versions
CPE | From | Up to |
---|---|---|
cpe:2.3:o:cisco:ios:12.3\(7\)xm:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(7\)xr:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(7\)xr1:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(7\)xr2:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(7\)xr3:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(7\)xr4:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(7\)xr5:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(7\)xr6:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(7\)xr7:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(8\)ja2:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(8\)jea1:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(8\)jea2:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(8\)jea3:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(8\)jeb:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:12.3\(8\)jeb1:*:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page