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CVE-2020-27121— Cisco Unified Communications Manager IM and Presence Service Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco Unified Communications Manager IM and Presence Service
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 Unified Communications Manager（CUCM，Unified CM，CallManager）是美国思科（Cisco）公司的一款统一通信系统中的呼叫处理组件。该组件提供了一种可扩展、可分布和高可用的企业IP电话呼叫处理解决方案。 Cisco Unified Communications Manager IM 和 Presence Service的XCP 存在安全漏洞，该漏洞可触发致命错误，以导致拒绝服务。

CVSS 4.3 · Medium EPSS 1.16% · P66

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-27121

Vulnerability Information
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Vulnerability Title
Cisco Unified Communications Manager IM and Presence Service Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) Software could allow an authenticated, remote attacker to cause the Cisco XCP Authentication Service on an affected device to restart, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of login requests. An attacker could exploit this vulnerability by sending a crafted client login request to an affected device. A successful exploit could allow the attacker to cause a process to crash, resulting in a DoS condition for new login attempts. Users who are authenticated at the time of the attack would not be affected. There are workarounds that address this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Unified Communications Manager 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Unified Communications Manager（CUCM，Unified CM，CallManager）是美国思科（Cisco）公司的一款统一通信系统中的呼叫处理组件。该组件提供了一种可扩展、可分布和高可用的企业IP电话呼叫处理解决方案。 Cisco Unified Communications Manager IM 和 Presence Service的XCP 存在安全漏洞，该漏洞可触发致命错误，以导致拒绝服务。
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 Unified Communications Manager IM and Presence Service n/a -

II. Public POCs for CVE-2020-27121

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III. Intelligence Information for CVE-2020-27121

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Vendor Advisories for CVE-2020-27121 (1)

Same Patch Batch · Cisco · 2020-11-06 · 27 CVEs total

CVE-2020-3603 7.8 HIGH Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne
CVE-2020-3573 7.8 HIGH Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne
CVE-2020-3593 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2020-3594 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2020-3600 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2020-3604 7.8 HIGH Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne
CVE-2020-3595 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2020-3574 7.5 HIGH Cisco IP Phone TCP Packet Flood Denial of Service Vulnerability
CVE-2020-3588 7.3 HIGH Cisco Webex Meetings Desktop App Arbitrary Code Execution Vulnerability
CVE-2020-3556 7.3 HIGH Cisco AnyConnect Secure Mobility Client Arbitrary Code Execution Vulnerability
CVE-2020-27129 6.7 MEDIUM Cisco SD-WAN vManage Software Command Injection Vulnerability
CVE-2020-3592 6.5 MEDIUM Cisco SD-WAN vManage Software Authorization Bypass Vulnerability
CVE-2020-26084 6.5 MEDIUM Cisco Edge Fog Fabric Resource Exposure Vulnerability
CVE-2020-27128 6.5 MEDIUM Cisco SD-WAN vManage Software Arbitrary File Creation Vulnerability
CVE-2020-3590 6.4 MEDIUM Cisco SD-WAN vManage Software Cross-Site Scripting Vulnerability
CVE-2020-3587 6.4 MEDIUM Cisco SD-WAN vManage Software Cross-Site Scripting Vulnerability
CVE-2020-3371 6.3 MEDIUM Cisco Integrated Management Controller Command Injection Vulnerability
CVE-2020-3551 6.1 MEDIUM Cisco Identity Services Engine Cross-Site Scripting Vulnerability
CVE-2020-27123 5.5 MEDIUM Cisco AnyConnect Secure Mobility Client for Windows Arbitrary File Read Vulnerability
CVE-2020-26083 4.8 MEDIUM Cisco Identity Services Engine Cross-Site Scripting Vulnerability

Showing top 20 of 27 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Unified Communications Manager IM and Presence Service
Same vendor: Cisco
Same weakness: CWE-248

V. Comments for CVE-2020-27121

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