CVE-2019-1635

Cisco IP Phone 7800 Series and 8800 Series Session Initiation Protocol XML Denial of Service 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.

Categories

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.16% Top 25%
Vendor Advisory cisco.com
Affected: Cisco Cisco Wireless IP Phone 8821 and 8821-EX
Affected: Cisco Cisco IP Phone 7800 Series and 8800 Series
Published at:
Updated at:

References

Link Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-phone-sip-xml-dos vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-1635?
CVE-2019-1635 has been scored as a high severity vulnerability.
How to fix CVE-2019-1635?
To fix CVE-2019-1635, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-1635 being actively exploited in the wild?
It is possible that CVE-2019-1635 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-1635?
CVE-2019-1635 affects Cisco Cisco Wireless IP Phone 8821 and 8821-EX, Cisco Cisco IP Phone 7800 Series and 8800 Series.
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