CVE-2019-1635
high-risk
Published 2019-05-03
A vulnerability in the call-handling functionality of Session Initiation Protocol (SIP) Software for Cisco IP Phone 7800 Series and 8800 Series could allow an unauthenticated, remote attacker to cause an affected phone to reload unexpectedly, resulting in a temporary denial of service (DoS) condition. The vulnerability is due to incomplete error handling when XML data within a SIP packet is parsed. An attacker could exploit this vulnerability by sending a SIP packet that contains a malicious XML payload to an affected phone. A successful exploit could allow the attacker to cause the affected phone to reload unexpectedly, resulting in a temporary DoS condition.
Do I need to act?
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0.98% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ LOW complexity
Affected Products (20)
Ip Conference Phone 7832 Firmware
Ip Conference Phone 7832 Firmware
Ip Conference Phone 7832 Firmware
Ip Conference Phone 7832 Firmware
Ip Conference Phone 8832 Firmware
Ip Conference Phone 8832 Firmware
Ip Conference Phone 8832 Firmware
Ip Conference Phone 8832 Firmware
Ip Phone 7811 Firmware
Ip Phone 7811 Firmware
Ip Phone 7811 Firmware
Ip Phone 7811 Firmware
Ip Phone 7821 Firmware
Ip Phone 7821 Firmware
Ip Phone 7821 Firmware
Ip Phone 7821 Firmware
Ip Phone 7841 Firmware
Ip Phone 7841 Firmware
Ip Phone 7841 Firmware
Ip Phone 7841 Firmware
Affected Vendors
References (2)
56
/ 100
high-risk
Severity
26/34 · High
Exploitability
3/34 · Minimal
Exposure
27/34 · High