VulnerabilityModified

CVE-2017-12259

HIGH 7.5EPSS 2.30%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (2.30%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A vulnerability in the implementation of Session Initiation Protocol (SIP) functionality in Cisco Small Business SPA51x Series IP Phones could allow an unauthenticated, remote attacker to cause an affected device to become unresponsive, resulting in a denial of service (DoS) condition. The vulnerability is due to the improper handling of SIP request messages by an affected device. An attacker could exploit this vulnerability by sending malformed SIP messages to an affected device. A successful exploit could allow the attacker to cause the affected device to become unresponsive, resulting in a DoS condition that persists until the device is restarted manually. This vulnerability affects Cisco Small Business SPA51x Series IP Phones that are running Cisco SPA51x Firmware Release 7.6.2SR1 or earlier. Cisco Bug IDs: CSCvc63982.

CVSS 3.0: 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 2.30% probability · 82th percentile
CISA KEV: Not listed
Weakness: CWE-119
Affected: cisco/small business ip phone firmware
Source: psirt@cisco.com

References

http://www.securityfocus.com/bid/101488Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039615Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171018-sipVendor Advisory
http://www.securityfocus.com/bid/101488Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039615Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171018-sipVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.