CVE-2021-1526— Cisco Webex Player Memory Corruption Vulnerability
Quick assessment
Affected
Cisco Cisco Webex Meetings
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 Webex Network Webex Player是美国思科（Cisco）公司的一款用于播放视频会议记录的播放器。 Cisco Webex Player 存在缓冲区错误漏洞，攻击者可利用该漏洞在受影响的系统上执行任意代码。
Possible ATT&CK Techniques 3 AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-1526
Vulnerability Information
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Vulnerability Title
Cisco Webex Player Memory Corruption Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in Cisco Webex Player for Windows and MacOS could allow an attacker to execute arbitrary code on an affected system. This vulnerability is due to insufficient validation of values in Webex recording files that are in Webex Recording Format (WRF). An attacker could exploit this vulnerability by sending a user a malicious WRF file through a link or email attachment and persuading the user to open the file with the affected software on the local system. A successful exploit could allow the attacker to execute arbitrary code on the affected system with the privileges of the targeted user.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Webex Network Webex Player 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Webex Network Webex Player是美国思科（Cisco）公司的一款用于播放视频会议记录的播放器。 Cisco Webex Player 存在缓冲区错误漏洞，攻击者可利用该漏洞在受影响的系统上执行任意代码。
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 Webex Meetings | n/a | - |
|
II. Public POCs for CVE-2021-1526
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2021-1526 (1)
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-player-kOf8zVT vendor-advisory x_refsource_CISCO
Same Patch Batch · Cisco · 2021-06-04 · 15 CVEs total
| CVE-2021-1540 | 8.1 HIGH | Cisco ASR 5000 Series Software Authorization Bypass Vulnerabilities |
| CVE-2021-1539 | 8.1 HIGH | Cisco ASR 5000 Series Software Authorization Bypass Vulnerabilities |
| CVE-2021-1528 | 7.8 HIGH | Cisco SD-WAN Software Privilege Escalation Vulnerability |
| CVE-2021-1503 | 7.8 HIGH | Cisco Webex Network Recording Player and Webex Player Memory Corruption Vulnerability |
| CVE-2021-1502 | 7.8 HIGH | Cisco Webex Network Recording Player and Webex Player Memory Corruption Vulnerability |
| CVE-2021-1564 | 6.5 MEDIUM | Cisco Video Surveillance 7000 Series IP Cameras Cisco Discovery and Link Layer Discovery P |
| CVE-2021-1563 | 6.5 MEDIUM | Cisco Video Surveillance 7000 Series IP Cameras Cisco Discovery and Link Layer Discovery P |
| CVE-2021-1537 | 6.2 MEDIUM | Cisco ThousandEyes Recorder Information Disclosure Vulnerability |
| CVE-2021-1544 | 5.5 MEDIUM | Cisco Webex Meetings Client Software Logging Information Disclosure Vulnerability |
| CVE-2021-1527 | 5.3 MEDIUM | Cisco Webex Player Memory Corruption Vulnerability |
| CVE-2021-1517 | 5.0 MEDIUM | Cisco Webex Meetings and Webex Meetings Server Multimedia Sharing Security Bypass Vulnerab |
| CVE-2021-1536 | 4.8 MEDIUM | Cisco Webex Meetings, Webex Network Recording Player, and Webex Teams DLL Injection Vulner |
| CVE-2021-1538 | 4.7 MEDIUM | Cisco Common Services Platform Collector Command Injection Vulnerability |
| CVE-2021-1525 | 4.7 MEDIUM | Cisco Webex Meetings and Webex Meetings Server File Redirect Vulnerability |
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V. Comments for CVE-2021-1526
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