Server-side template injection in Jira Service Management Server

Published: 2021-12-28

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2021-39115
CWE-ID	CWE-94
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software Subscribe	Jira Service Management Server Server applications / Other server solutions
Vendor	Atlassian

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Code Injection

EUVDB-ID: #VU59101

Risk: Low

CVSSv3.1: 3.4 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-39115

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

Exploit availability: Yes

Description

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

The vulnerability exists due to improper input validation in the Email Template feature. A remote user with "Jira Administrators" access can execute arbitrary Java code or run arbitrary system commands by injecting the code via the Email Template feature.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Jira Service Management Server: 4.0.0 - 4.17.1

CPE2.3

External links

http://jira.atlassian.com/browse/JSDSERVER-8665

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.