CVE-2020-11498

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

Slack Nebula through 1.1.0 contains a relative path vulnerability that allows a low-privileged attacker to execute code in the context of the root user via tun_darwin.go or tun_windows.go. A user can also use Nebula to execute arbitrary code in the user's own context, e.g., for user-level persistence or to bypass security controls. NOTE: the vendor states that this "requires a high degree of access and other preconditions that are tough to achieve."

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-22

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://www.pwn3d.org/posts/7918501-slack-nebula-relative-path-bug-bounty-disclosureExploit, Third Party Advisory
https://github.com/slackhq/nebula/pull/191Patch, Third Party Advisory
http://www.pwn3d.org/posts/7918501-slack-nebula-relative-path-bug-bounty-disclosureExploit, Third Party Advisory
https://github.com/slackhq/nebula/pull/191Patch, Third Party Advisory

Timeline

Published: Apr 2, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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