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CVE-2021-27771— HCL Sametime is susceptible a file transfer service vulnerability

Quick assessment

Affected
HCL Software Sametime
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.

HCL Sametime是HCL Technologies的一个会议解决方案。 HCL Technologies HCL Sametime 11.6版本存在安全漏洞，该漏洞源于应用中的用户SID 可以被修改。攻击者可以利用该漏洞修改SID实现任意文件上传或目录删除从而导致拒绝服务。

CVSS 8.2 · High EPSS 0.73% · P53
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I. Basic Information for CVE-2021-27771

Vulnerability Information
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Vulnerability Title
HCL Sametime is susceptible a file transfer service vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
User SID can be modified resulting in an Arbitrary File Upload or deletion of directories causing a Denial of Service. When interacting in a normal matter with the Sametime chat application, users hold a cookie containing their session ID (SID). This value is also used when sending chat messages, receiving notifications and/or transferring files.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
HCL Technologies HCL Sametime 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HCL Sametime是HCL Technologies的一个会议解决方案。 HCL Technologies HCL Sametime 11.6版本存在安全漏洞，该漏洞源于应用中的用户SID 可以被修改。攻击者可以利用该漏洞修改SID实现任意文件上传或目录删除从而导致拒绝服务。
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
HCL Software Sametime 11.6 -

II. Public POCs for CVE-2021-27771

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III. Intelligence Information for CVE-2021-27771

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Other References for CVE-2021-27771 (1)

Same Patch Batch · HCL Software · 2022-05-12 · 7 CVEs total

CVE-2021-27777 7.5 HIGH HCL Unica Platform is vulnerable to XML External Entity (XXE) injection
CVE-2021-27772 7.1 HIGH HCL Sametime is vulnerable to an information disclosure
CVE-2021-27770 6.8 MEDIUM HCL Sametime is vulnerable to arbitrary HTTP requests
CVE-2021-27768 6.3 MEDIUM An SSL certificate host verification vulnerability affects HCL Verse for Android
CVE-2021-27769 5.3 MEDIUM HCL Sametime is vulnerable to an information disclosure
CVE-2021-27773 4.2 MEDIUM HCL Sametime is vulnerable to clickjacking

IV. Related Vulnerabilities

Same product: Sametime
Same vendor: HCL Software
Same weakness: CWE-434

V. Comments for CVE-2021-27771

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