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CVE-2019-1676— Cisco Meeting Server SIP Processing Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco Meeting Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco Meeting Server (CMS) software中对会话发起协议（SIP）的调用处理存在输入验证漏洞，该漏洞源于程序没有充分地验证会话描述协议的消息。远程攻击者可借助特制的SDP消息利用该漏洞造成CMS重新加载，导致拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 1.82% · P79

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2019-1676

Vulnerability Information
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Vulnerability Title
Cisco Meeting Server SIP Processing Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Session Initiation Protocol (SIP) call processing of Cisco Meeting Server (CMS) software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition of the Cisco Meeting Server. The vulnerability is due to insufficient validation of Session Description Protocol (SDP) messages. An attacker could exploit this vulnerability by sending a crafted SDP message to the CMS call bridge. An exploit could allow the attacker to cause the CMS to reload, causing a DoS condition for all connected clients. Versions prior to 2.3.9 are affected.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Meeting Server 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Meeting Server (CMS) software中对会话发起协议（SIP）的调用处理存在输入验证漏洞，该漏洞源于程序没有充分地验证会话描述协议的消息。远程攻击者可借助特制的SDP消息利用该漏洞造成CMS重新加载，导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco Meeting Server unspecified ~ 2.3.9 -

II. Public POCs for CVE-2019-1676

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III. Intelligence Information for CVE-2019-1676

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Vendor Advisories for CVE-2019-1676 (2)

Same Patch Batch · Cisco · 2019-02-08 · 3 CVEs total

CVE-2019-1672 Cisco Web Security Appliance Decryption Policy Bypass Vulnerability
CVE-2019-1673 Cisco Identity Services Engine Cross-Site Scripting Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Meeting Server
Same vendor: Cisco
Same weakness: CWE-20