Auth bypass in Pi-Hole
CVE-2020-14971
Pi-hole through 5.0 allows code injection in piholedhcp (the Static DHCP Leases section) by modifying Teleporter backup files and then restoring them. This occurs in settings.php. To exploit this, an attacker would request a backup of limited files via teleporter.php. These are placed into a .tar.gz archive. The attacker then modifies the host parameter in dnsmasq.d files, and then compresses and uploads these files again.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Weakness classification (CWE)
References
- blog.telspace.co.za/2020/06/pi-hole-code-injection-cve-2020-14971.html (Third Party Advisory)
- github.com/pi-hole/AdminLTE/pull/1443 (Third Party Advisory)
- github.com/pi-hole/AdminLTE/commit/c949516ee15fa6a9b0c8511cc4c4d6b0893f3e69 (Patch, Third Party Advisory)
- github.com/pi-hole/AdminLTE/commit/8f6e1365b6dec0ae1aa0b0b15b102c9133f347e5 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-14971?
- CVE-2020-14971 is a high-severity vulnerability in Pi-Hole, classified under Missing Authorization. CVSS score: 7.8/10. Published 2020-06-23.
- How severe is CVE-2020-14971?
- High severity. CVSS v3 base score is 7.8 out of 10.