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HIGH · 7.5

CVE-2019-1635

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...

Vulnerability Description

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.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
CiscoIp Conference Phone 7832 Firmware9.3\(4\)sr3
CiscoIp Conference Phone 7832-
CiscoIp Conference Phone 8832 Firmware9.3\(4\)sr3
CiscoIp Conference Phone 8832-
CiscoIp Phone 7811 Firmware9.3\(4\)sr3
CiscoIp Phone 7811-
CiscoIp Phone 7821 Firmware9.3\(4\)sr3
CiscoIp Phone 7821-
CiscoIp Phone 7841 Firmware9.3\(4\)sr3
CiscoIp Phone 7841-
CiscoIp Phone 7861 Firmware9.3\(4\)sr3
CiscoIp Phone 7861-
CiscoIp Phone 8811 Firmware9.3\(4\)sr3
CiscoIp Phone 8811-
CiscoIp Phone 8841 Firmware9.3\(4\)sr3
CiscoIp Phone 8841-
CiscoIp Phone 8845 Firmware9.3\(4\)sr3
CiscoIp Phone 8845-
CiscoIp Phone 8851 Firmware9.3\(4\)sr3
CiscoIp Phone 8851-

Related Weaknesses (CWE)

CWE-755CWE-399

References

FAQ

What is CVE-2019-1635?

CVE-2019-1635 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...

How severe is CVE-2019-1635?

CVE-2019-1635 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2019-1635?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ip Conference Phone 7832 Firmware, Cisco Ip Conference Phone 7832, Cisco Ip Conference Phone 8832 Firmware, Cisco Ip Conference Phone 8832, Cisco Ip Phone 7811 Firmware.