Auth bypass in Elastic X-Pack
CVE-2018-3822
X-Pack Security versions 6.2.0, 6.2.1, and 6.2.2 are vulnerable to a user impersonation attack via incorrect XML canonicalization and DOM traversal. An attacker might have been able to impersonate a legitimate user if the SAML Identity Provider allows for self registration with arbitrary identifiers and the attacker can register an account which an identifier that shares a suffix with a legitimate account. Both of those conditions must be true in order to exploit this flaw.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.016 (75.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
- Elastic X-Pack — versions 6.2.0, 6.2.1, 6.2.2
- Elastic X-Pack Security — versions 6.2.0, 6.2.1, and 6.2.2
Weakness classification (CWE)
References
- discuss.elastic.co/t/elastic-stack-6-2-3-security-update/124848 (Vendor Advisory)
Frequently asked questions
- What is CVE-2018-3822?
- CVE-2018-3822 is a critical-severity vulnerability in Elastic X-Pack, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-03-30.
- How severe is CVE-2018-3822?
- Critical severity. CVSS v3 base score is 9.8 out of 10.