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CVE-2021-34739— Cisco Small Business Series Switches Session Credentials Replay Vulnerability

Quick assessment

Affected
Cisco Cisco Small Business Smart and Managed Switches
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 Small Business是美国思科（Cisco）公司的一个交换机。 Cisco Small Business 存在代码问题漏洞，该漏洞是由于思科交换机的会话据证验证机制导致。攻击者可利用该漏洞重放有效的用户会话凭据，在未经授权的情况下登录web管理界面。

CVSS 8.1 · High EPSS 1.67% · P76
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I. Basic Information for CVE-2021-34739

Vulnerability Information
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Vulnerability Title
Cisco Small Business Series Switches Session Credentials Replay Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the web-based management interface of multiple Cisco Small Business Series Switches could allow an unauthenticated, remote attacker to replay valid user session credentials and gain unauthorized access to the web-based management interface of an affected device. This vulnerability is due to insufficient expiration of session credentials. An attacker could exploit this vulnerability by conducting a man-in-the-middle attack against an affected device to intercept valid session credentials and then replaying the intercepted credentials toward the same device at a later time. A successful exploit could allow the attacker to access the web-based management interface with administrator privileges.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的会话过期机制
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Small Business 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Small Business是美国思科（Cisco）公司的一个交换机。 Cisco Small Business 存在代码问题漏洞，该漏洞是由于思科交换机的会话据证验证机制导致。攻击者可利用该漏洞重放有效的用户会话凭据，在未经授权的情况下登录web管理界面。
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 Small Business Smart and Managed Switches n/a -

II. Public POCs for CVE-2021-34739

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III. Intelligence Information for CVE-2021-34739

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Vendor Advisories for CVE-2021-34739 (1)

Same Patch Batch · Cisco · 2021-11-04 · 18 CVEs total

CVE-2021-34795 10.0 CRITICAL Cisco Catalyst PON Series Switches Optical Network Terminal Vulnerabilities
CVE-2021-40112 10.0 CRITICAL Cisco Catalyst PON Series Switches Optical Network Terminal Vulnerabilities
CVE-2021-40113 10.0 CRITICAL Cisco Catalyst PON Series Switches Optical Network Terminal Vulnerabilities
CVE-2021-40119 9.8 CRITICAL Cisco Policy Suite Static SSH Keys Vulnerability
CVE-2021-34741 7.5 HIGH Cisco Email Security Appliance Denial of Service Vulnerability
CVE-2021-40124 6.7 MEDIUM Cisco AnyConnect Secure Mobility Client for Windows with Network Access Manager Module Pri
CVE-2021-34773 6.5 MEDIUM Cisco Unified Communications Products Cross-Site Request Forgery Vulnerability
CVE-2021-40120 6.5 MEDIUM Cisco Small Business RV Series Routers Command Injection Vulnerability
CVE-2021-40115 6.1 MEDIUM Cisco Webex Video Mesh Cross-Site Scripting Vulnerability
CVE-2021-1500 5.4 MEDIUM Cisco Webex Video Mesh Arbitrary Site Redirection Vulnerability
CVE-2021-34784 5.4 MEDIUM Cisco Prime Infrastructure and Evolved Programmable Network Manager Stored Cross-Site Scri
CVE-2021-40128 5.3 MEDIUM Cisco Webex Meetings Email Content Injection Vulnerability
CVE-2021-40127 5.3 MEDIUM Cisco Small Business 200, 300, and 500 Series Switches Web-Based Management Interface Deni
CVE-2021-34774 4.9 MEDIUM Cisco Common Services Platform Collector Information Disclosure Vulnerability
CVE-2021-34731 4.8 MEDIUM Cisco Prime Access Registrar Stored Cross-Site Scripting Vulnerability
CVE-2021-40126 4.3 MEDIUM Cisco Umbrella Email Enumeration Vulnerability
CVE-2021-34701 4.3 MEDIUM Cisco Unified Communications Products Path Traversal Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Small Business Smart and Managed Switches
Same vendor: Cisco
Same weakness: CWE-613

V. Comments for CVE-2021-34739

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