VDB-134336 · CVE-2019-1635 · Qualys 13499

Cisco IP Phone 7800/IP Phone 8800 Session Initiation Protocol SIP Packet 7pk error

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.8$5k-$25k0.00

A vulnerability, which was classified as problematic, has been found in Cisco IP Phone 7800 and IP Phone 8800 (IP Phone Software) (version now known). Affected by this issue is some unknown processing of the component Session Initiation Protocol. The manipulation as part of a SIP Packet leads to a 7pk error vulnerability. Using CWE to declare the problem leads to CWE-388. Impacted is availability. CVE summarizes:

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.

The bug was discovered 05/01/2019. The weakness was released 05/03/2019 as cisco-sa-20190501-phone-sip-xm as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is handled as CVE-2019-1635 since 12/06/2018. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 09/12/2023).

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 13499 (Cisco IP Phone 7800 Series and 8800 Series Session Initiation Protocol XML Denial of Service Vulnerability(cisco-sa-20190501-phone-sip-xml-dos)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.8

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: 7pk error
CWE: CWE-388
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/06/2018 🔍
05/01/2019 +146 days 🔍
05/03/2019 +2 days 🔍
05/03/2019 +0 days 🔍
09/12/2023 +1593 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20190501-phone-sip-xm
Status: Confirmed

CVE: CVE-2019-1635 (🔍)

Entryinfo

Created: 05/03/2019 22:01
Updated: 09/12/2023 08:19
Changes: 05/03/2019 22:01 (60), 06/06/2020 14:13 (1), 09/12/2023 08:19 (14)
Complete: 🔍

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