Remote code execution in Slack desktop application

1) Code Injection

EUVDB-ID: #VU46184

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: N/A

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

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation when processing input passed to the application. A remote attacker can create a specially crafted web page, share a specially crafted post with the victim, trick the victim into clicking on a link or image and execute arbitrary code on the system with privilege of the current user.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Slack for Windows: 4.0.0 - 4.3.4

Slack for Mac: 4.0.0 - 4.3.3

Slack for Linux: 4.0.0 - 4.3.2

CPE2.3

• cpe:2.3:a:slack_technologies:slack_for_windows:4.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:slack_technologies:slack_for_windows:4.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:slack_technologies:slack_for_windows:4.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:slack_technologies:slack_for_mac:4.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:slack_technologies:slack_for_mac:4.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:slack_technologies:slack_for_mac:4.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:slack_technologies:slack_for_linux:4.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:slack_technologies:slack_for_linux:4.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:slack_technologies:slack_for_linux:4.0.2:*:*:*:*:*:*:*

External links

https://hackerone.com/reports/783877

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.