Auth bypass in Dlink Dap-1522
CVE-2020-15896
An authentication-bypass issue was discovered on D-Link DAP-1522 devices 1.4x before 1.10b04Beta02. There exist a few pages that are directly accessible by any unauthorized user, e.g., logout.php and login.php. This occurs because of checking the value of NO_NEED_AUTH. If the value of NO_NEED_AUTH is 1, the user has direct access to the webpage without any authentication. By appending a query string NO_NEED_AUTH with the value of 1 to any protected URL, any unauthorized user can access the application directly, as demonstrated by bsc_lan.php?NO_NEED_AUTH=1.
Vulnerability class: Broken Authentication
EPSS: 0.017 (75.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Dlink Dap-1522 — versions a1
- Dlink Dap-1522_firmware — versions 1.41, 1.42
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Patch, x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-15896?
- CVE-2020-15896 is a high-severity vulnerability in Dlink Dap-1522, classified under Improper Authentication. CVSS score: 7.5/10. Published 2020-07-22.
- How severe is CVE-2020-15896?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-15896 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.