CVE-2021-34771— Cisco IOS XR Software Unauthorized Information Disclosure Vulnerability
Quick assessment
Affected
Cisco Cisco IOS XR Software
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 IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR 存在信息泄露漏洞，该漏洞源于在执行特定命令期间未充分应用限制。攻击者可利用该漏洞通过运行特定命令来访问敏感配置信息
Possible ATT&CK Techniques 1 AI
T1528 · Steal Application Access Token
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I. Basic Information for CVE-2021-34771
Vulnerability Information
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Vulnerability Title
Cisco IOS XR Software Unauthorized Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Cisco IOS XR Software CLI could allow an authenticated, local attacker to view more information than their privileges allow. This vulnerability is due to insufficient application of restrictions during the execution of a specific command. An attacker could exploit this vulnerability by running a specific command. A successful exploit could allow the attacker to view sensitive configuration information that their privileges might not otherwise allow them to access.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过发送数据的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XR 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR 存在信息泄露漏洞，该漏洞源于在执行特定命令期间未充分应用限制。攻击者可利用该漏洞通过运行特定命令来访问敏感配置信息
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 IOS XR Software | n/a | - |
|
II. Public POCs for CVE-2021-34771
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2021-34771 (1)
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-infodisc-CjLdGMc5 vendor-advisory x_refsource_CISCO
Same Patch Batch · Cisco · 2021-09-09 · 13 CVEs total
| CVE-2021-34720 | 8.6 HIGH | Cisco IOS XR Software IP Service Level Agreements and Two-Way Active Measurement Protocol |
| CVE-2021-34718 | 8.1 HIGH | Cisco IOS XR Software Arbitrary File Read and Write Vulnerability |
| CVE-2021-34728 | 7.8 HIGH | Cisco IOS XR Software Authenticated User Privilege Escalation Vulnerabilities |
| CVE-2021-34719 | 7.8 HIGH | Cisco IOS XR Software Authenticated User Privilege Escalation Vulnerabilities |
| CVE-2021-34713 | 7.4 HIGH | Cisco IOS XR Software for ASR 9000 Series Routers Denial of Service Vulnerability |
| CVE-2021-34722 | 6.7 MEDIUM | Cisco IOS XR Software Command Injection Vulnerabilities |
| CVE-2021-34721 | 6.7 MEDIUM | Cisco IOS XR Software Command Injection Vulnerabilities |
| CVE-2021-34786 | 6.5 MEDIUM | Cisco BroadWorks CommPilot Application Software Vulnerabilities |
| CVE-2021-34785 | 6.5 MEDIUM | Cisco BroadWorks CommPilot Application Software Vulnerabilities |
| CVE-2021-34709 | 6.0 MEDIUM | Cisco IOS XR Software for Cisco 8000 and Network Convergence System 540 Series Routers Ima |
| CVE-2021-34708 | 6.0 MEDIUM | Cisco IOS XR Software for Cisco 8000 and Network Convergence System 540 Series Routers Ima |
| CVE-2021-34737 | 5.8 MEDIUM | Cisco IOS XR Software DHCP Version 4 Server Denial of Service Vulnerability |
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V. Comments for CVE-2021-34771
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