VulnerabilityModified
CVE-2021-3166
An attacker can upload arbitrary file content as a firmware update when the filename Settings_DSL-N14U-B1.trx is used.
HIGH 7.5EPSS 2.88%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.88%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered on ASUS DSL-N14U-B1 1.1.2.3_805 devices. An attacker can upload arbitrary file content as a firmware update when the filename Settings_DSL-N14U-B1.trx is used. Once this file is loaded, shutdown measures on a wide range of services are triggered as if it were a real update, resulting in a persistent outage of those services.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.88% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-434
- Affected
- asus/dsl-n14u b1 firmware
- Source
- cve@mitre.org
References
- https://github.com/kaisersource/kaisersource.github.io/blob/main/_posts/2021-01-17-dsl-n14u.mdExploit, Third Party Advisory
- https://kaisersource.github.io/dsl-n14uExploit, Third Party Advisory
- https://github.com/kaisersource/kaisersource.github.io/blob/main/_posts/2021-01-17-dsl-n14u.mdExploit, Third Party Advisory
- https://kaisersource.github.io/dsl-n14uExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.