SB2021060709 - Remote code execution in Emissary

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Main Vulnerability Database SB2021060709

SB2021060709 - Remote code execution in Emissary

Published: June 7, 2021 Updated: April 7, 2026

Security Bulletin ID SB2021060709
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Code Injection (CVE-ID: CVE-2021-32647)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in the CreatePlace REST endpoint. A remote administrator can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


2) Server-Side Request Forgery (SSRF) (CVE-ID: CVE-2021-32639)

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:L/VA:L/SC:L/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to disclose sensitive information.

The vulnerability exists due to server-side request forgery in RegisterPeerAction and AddChildDirectoryAction endpoints when handling crafted POST requests. A remote privileged user can send a specially crafted request to disclose sensitive information.

Some forged requests are sent to attacker-controlled hosts, including authenticated requests to the /emissary/RegisterPeer.action endpoint and non-authenticated requests to the /emissary/Heartbeat.action endpoint.


Remediation

Install update from vendor's website.

References