Buffer overflow in ASUS Asuswrt-Merlin

CVE-2018-20336

An issue was discovered in ASUSWRT 3.0.0.4.384.20308. There is a stack-based buffer overflow issue in parse_req_queries function in wanduck.c via a long string over UDP, which may lead to an information leak.

Vulnerability class: Buffer Overflow

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.017 (77.3th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.3% 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-2018-20336: held from 0.020 to 0.017.

EPSS over last 30 days · oldest: 0.020 · newest: 0.017 · change: -0.003

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2018-20336?
CVE-2018-20336 is a high-severity vulnerability in ASUS Asuswrt-Merlin, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2019-09-17.
How severe is CVE-2018-20336?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2018-20336 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.