VDB-131086 · CVE-2019-1684 · BID 107104

Cisco IP Phone 7800/IP Phone 8800 up to 12.6 Link Layer Discovery Protocol LDP Packet resource management

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.7	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Cisco IP Phone 7800 and IP Phone 8800 up to 12.6 and classified as problematic. Affected is an unknown function of the component Link Layer Discovery Protocol. Executing a manipulation as part of LDP Packet can lead to resource management. This vulnerability is handled as CVE-2019-1684. The attack can only be done within the local network. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Cisco IP Phone 7800 and IP Phone 8800 up to 12.6 (IP Phone Software). This vulnerability affects an unknown code of the component Link Layer Discovery Protocol. The manipulation as part of a LDP Packet leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. CVE summarizes:

A vulnerability in the Cisco Discovery Protocol or Link Layer Discovery Protocol (LLDP) implementation for the Cisco IP Phone 7800 and 8800 Series could allow an unauthenticated, adjacent attacker to cause an affected phone to reload unexpectedly, resulting in a temporary denial of service (DoS) condition. The vulnerability is due to missing length validation of certain Cisco Discovery Protocol or LLDP packet header fields. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol or LLDP packet to the targeted phone. A successful exploit could allow the attacker to cause the affected phone to reload unexpectedly, resulting in a temporary DoS condition. Versions prior to 12.6(1)MN80 are affected.

The bug was discovered 02/20/2019. The weakness was released 02/21/2019 as cisco-sa-20190220-cdp-lldp-dos as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability was named CVE-2019-1684 since 12/06/2018. The attack needs to be initiated within the local network. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k.

Upgrading to version 12.6(1)MN80 eliminates this vulnerability.

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Productinfo

Type

IP Phone Software

Vendor

Cisco

Name

Version

License

commercial

Website

Vendor: https://www.cisco.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 6.5
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: IP Phone 7800/IP Phone 8800 12.6(1)MN80

Timelineinfo

12/06/2018 🔍
02/20/2019 +76 days 🔍
02/21/2019 +1 days 🔍
02/22/2019 +1 days 🔍
07/19/2023 +1608 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20190220-cdp-lldp-dos
Status: Confirmed

CVE: CVE-2019-1684 (🔍)
GCVE (CVE): GCVE-0-2019-1684
GCVE (VulDB): GCVE-100-131086
SecurityFocus: 107104

Entryinfo

Created: 02/22/2019 06:54
Updated: 07/19/2023 07:34
Changes: 02/22/2019 06:54 (61), 05/12/2020 07:32 (1), 07/19/2023 07:28 (4), 07/19/2023 07:34 (12)
Complete: 🔍
Cache ID: 216::103