RCE in ASUS Asuswrt

CVE-2018-20334

An issue was discovered in ASUSWRT 3.0.0.4.384.20308. When processing the /start_apply.htm POST data, there is a command injection issue via shell metacharacters in the fb_email parameter. By using this issue, an attacker can control the router and get shell.

Vulnerability class: Command Injection (OS Command Injection)

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: 0.038 (89.8th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2018-20334: held from 0.039 to 0.038.

EPSS over last 30 days · oldest: 0.039 · newest: 0.038 · change: -0.002

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2018-20334?
CVE-2018-20334 is a critical-severity vulnerability in ASUS Asuswrt, classified under OS Command Injection. CVSS score: 9.8/10. Published 2020-03-20.
How severe is CVE-2018-20334?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-20334 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.