MediumCVE-2019-1684

Cisco IP Phone 8800 Series Software: Resource Management Errors (CVE-2019-1684)

Published 21.02.2019Sources: CVE.org

What is affected, what to do

Update Cisco IP Phone 8800 Firmware 10.3(1)sr4 to version 12.6\(1\)mn80, Cisco IP Phone 7800 Firmware 12.6(1)mn80 to version 12.6\(1\)mn80, Cisco IP Conference Phone 7832 Firmware 11.0(4)SR2 to version 12.6\(1\)mn80.

Affected: Cisco IP Phone 8800 Firmware 10.3(1)sr4 lt *..12.6\(1\)mn80
Cisco IP Phone 7800 Firmware 12.6(1)mn80 lt *..12.6\(1\)mn80
Cisco IP Conference Phone 7832 Firmware 11.0(4)SR2 lt *..12.6\(1\)mn80
Cisco IP Conference Phone 8832 Firmware 12.5(1) lt *..12.6\(1\)mn80
Cisco IP Phone 7811 Firmware 11.0(4)SR2 lt *..12.6\(1\)mn80
Cisco IP Phone 7821 Firmware 10.3(1)SR4B lt *..12.6\(1\)mn80
Cisco IP Phone 7841 Firmware 10.3(1)SR4B lt *..12.6\(1\)mn80
Cisco IP Phone 7861 Firmware 9.3(4)SR3 lt *..12.6\(1\)mn80
Cisco IP Phone 8811 Firmware 10.3(1)SR4B lt *..12.6\(1\)mn80
Cisco IP Phone 8841 Firmware 9.3(4)SR3 lt *..12.6\(1\)mn80
Cisco IP Phone 8845 Firmware 11.0(4)SR2 lt *..12.6\(1\)mn80
Cisco IP Phone 8851 Firmware 11.0(4)SR2 lt *..12.6\(1\)mn80
Cisco IP Phone 8861 Firmware 11.0(4)SR2 lt *..12.6\(1\)mn80
Cisco IP Phone 8865 Firmware 9.3(4)SR3 lt *..12.6\(1\)mn80
Fixed in: Cisco IP Phone 8800 Firmware 10.3(1)sr4 12.6\(1\)mn80
Cisco IP Phone 7800 Firmware 12.6(1)mn80 12.6\(1\)mn80
Cisco IP Conference Phone 7832 Firmware 11.0(4)SR2 12.6\(1\)mn80
Cisco IP Conference Phone 8832 Firmware 12.5(1) 12.6\(1\)mn80
Cisco IP Phone 7811 Firmware 11.0(4)SR2 12.6\(1\)mn80
Cisco IP Phone 7821 Firmware 10.3(1)SR4B 12.6\(1\)mn80
Cisco IP Phone 7841 Firmware 10.3(1)SR4B 12.6\(1\)mn80
Cisco IP Phone 7861 Firmware 9.3(4)SR3 12.6\(1\)mn80
Cisco IP Phone 8811 Firmware 10.3(1)SR4B 12.6\(1\)mn80
Cisco IP Phone 8841 Firmware 9.3(4)SR3 12.6\(1\)mn80
Cisco IP Phone 8845 Firmware 11.0(4)SR2 12.6\(1\)mn80
Cisco IP Phone 8851 Firmware 11.0(4)SR2 12.6\(1\)mn80
Cisco IP Phone 8861 Firmware 11.0(4)SR2 12.6\(1\)mn80
Cisco IP Phone 8865 Firmware 9.3(4)SR3 12.6\(1\)mn80

Not sure whether and how you are affected? Ask a question about this vulnerability

Metrics

6.5

Priority

XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

Source: NVD, CVSS v3

6.5

CVSS v3

Severity Medium on the scale from 0 to 10.

Source: CVE.org

0.6 %

EPSS score

Low — model estimates < 1% exploitation likelihood.

Source: FIRST EPSS, percentile 50.7

Show all metrics

Severity: Medium
Priority (0–325) The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first? Read in glossary: 53.04 Methodology
Exploit maturity An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack. Read in glossary: no public PoC known
XIEM Effective CVSS XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command. Read in glossary: 6.5 Methodology
CVSS v3 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 6.5
EPSS score The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“. Read in glossary: 0.6 %; Low — model estimates < 1% exploitation likelihood.
EPSS percentile The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking. Read in glossary: 50.7; High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: —
Published: 21.02.2019
CISA assessment (SSVC): Exploitation: none known · not automatable · Technical impact: partial; Source: CISA Vulnrichment, as of 21 November 2024
CWE CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect. Read in glossary: CWE-399

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2 NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management. Read in glossary: Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
CRA The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates. Read in glossary: From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001 ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security. Read in glossary: Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

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.

Source: cvelistv5, NVD (NIST)

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

Affected products
		Affected versions	Fixed in
Cisco	Cisco IP Phone 8800 Series Software	`—`	—

Vendors and products

Affected operating systems

Affected operating systems

Other	cisco	ip_conference_phone_7832_firmware	—
Other	cisco	ip_conference_phone_8832_firmware	—
Other	cisco	ip_phone_7800_firmware	—
Other	cisco	ip_phone_7811_firmware	—
Other	cisco	ip_phone_7821_firmware	—
Other	cisco	ip_phone_7841_firmware	—
Other	cisco	ip_phone_7861_firmware	—
Other	cisco	ip_phone_8800_firmware	—
Other	cisco	ip_phone_8811_firmware	—
Other	cisco	ip_phone_8841_firmware	—
Other	cisco	ip_phone_8845_firmware	—
Other	cisco	ip_phone_8851_firmware	—
Other	cisco	ip_phone_8861_firmware	—
Other	cisco	ip_phone_8865_firmware	—

Weakness classes (CWE)

CWE-399Resource Management Errors
Category
Entry at MITRE CWE-399

References & sources

tools.cisco.com20190220 Cisco IP Phone 7800 and 8800 Series Cisco Discovery Protocol and Link Layer Discovery Protocol Denial of Service VulnerabilityVendor advisory, x_refsource_CISCO
securityfocus.com107104Vulnerability database, x_refsource_BID

Embed badge

Show the severity and KEV status of this vulnerability on your site – with a link back here. The image is updated hourly.

<a href="https://intel.neosec.eu/en/cve/CVE-2019-1684"><img src="https://intel.neosec.eu/badge/cve/CVE-2019-1684.svg?lang=en" alt="CVE-2019-1684 – NEOSEC Intel" height="20"></a>