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CVE-2019-1635

HIGHCVSS 7.5/10EPSS 1.97%

Last modified

CVE-2019-1635 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.97% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.97%

77.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIp Conference Phone 7832 Firmware9.3\(4\)sr3
CiscoIp Conference Phone 7832 Firmware10.3\(1\)sr4b
CiscoIp Conference Phone 7832 Firmware11.0\(4\)sr2
CiscoIp Conference Phone 7832 Firmware12.1\(1\)sr1
CiscoIp Conference Phone 8832 Firmware9.3\(4\)sr3
CiscoIp Conference Phone 8832 Firmware10.3\(1\)sr4b
CiscoIp Conference Phone 8832 Firmware11.0\(4\)sr2
CiscoIp Conference Phone 8832 Firmware12.1\(1\)sr1
CiscoIp Phone 7811 Firmware9.3\(4\)sr3
CiscoIp Phone 7811 Firmware10.3\(1\)sr4b
CiscoIp Phone 7811 Firmware11.0\(4\)sr2
CiscoIp Phone 7811 Firmware12.1\(1\)sr1
CiscoIp Phone 7821 Firmware9.3\(4\)sr3
CiscoIp Phone 7821 Firmware10.3\(1\)sr4b
CiscoIp Phone 7821 Firmware11.0\(4\)sr2
CiscoIp Phone 7821 Firmware12.1\(1\)sr1
CiscoIp Phone 7841 Firmware9.3\(4\)sr3
CiscoIp Phone 7841 Firmware10.3\(1\)sr4b
CiscoIp Phone 7841 Firmware11.0\(4\)sr2
CiscoIp Phone 7841 Firmware12.1\(1\)sr1
CiscoIp Phone 7861 Firmware9.3\(4\)sr3
CiscoIp Phone 7861 Firmware10.3\(1\)sr4b
CiscoIp Phone 7861 Firmware11.0\(4\)sr2
CiscoIp Phone 7861 Firmware12.1\(1\)sr1
CiscoIp Phone 8811 Firmware9.3\(4\)sr3
CiscoIp Phone 8811 Firmware10.3\(1\)sr4b
CiscoIp Phone 8811 Firmware11.0\(4\)sr2
CiscoIp Phone 8811 Firmware12.1\(1\)sr1
CiscoIp Phone 8841 Firmware9.3\(4\)sr3
CiscoIp Phone 8841 Firmware10.3\(1\)sr4b
CiscoIp Phone 8841 Firmware11.0\(4\)sr2
CiscoIp Phone 8841 Firmware12.1\(1\)sr1
CiscoIp Phone 8845 Firmware9.3\(4\)sr3
CiscoIp Phone 8845 Firmware10.3\(1\)sr4b
CiscoIp Phone 8845 Firmware11.0\(4\)sr2
CiscoIp Phone 8845 Firmware12.1\(1\)sr1
CiscoIp Phone 8851 Firmware9.3\(4\)sr3
CiscoIp Phone 8851 Firmware10.3\(1\)sr4b
CiscoIp Phone 8851 Firmware11.0\(4\)sr2
CiscoIp Phone 8851 Firmware12.1\(1\)sr1
CiscoIp Phone 8861 Firmware9.3\(4\)sr3
CiscoIp Phone 8861 Firmware10.3\(1\)sr4b
CiscoIp Phone 8861 Firmware11.0\(4\)sr2
CiscoIp Phone 8861 Firmware12.1\(1\)sr1
CiscoIp Phone 8865 Firmware9.3\(4\)sr3
CiscoIp Phone 8865 Firmware10.3\(1\)sr4b
CiscoIp Phone 8865 Firmware11.0\(4\)sr2
CiscoIp Phone 8865 Firmware12.1\(1\)sr1
CiscoUnified Ip 8831 Conference Phone1 Firmware9.3\(4\)sr3
CiscoUnified Ip 8831 Conference Phone1 Firmware10.3\(1\)sr4b

Showing 50 of 64 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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 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.
How severe is CVE-2019-1635?
CVE-2019-1635 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.97% probability of exploitation in the next 30 days.
How do I fix CVE-2019-1635?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-1635?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST