Path Traversal in Slack Nebula
CVE-2020-11498
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."
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.034 (88.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/slackhq/nebula/pull/191 (Patch, Third Party Advisory)
- www.pwn3d.org/posts/7918501-slack-nebula-relative-path-bug-bounty-disclosure (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-11498?
- CVE-2020-11498 is a high-severity vulnerability in Slack Nebula, classified under Path Traversal. CVSS score: 8.8/10. Published 2020-04-02.
- How severe is CVE-2020-11498?
- High severity. CVSS v3 base score is 8.8 out of 10.