by Kastro
Paper/Archive/CVE-2021-32030

CVE-2021-32030

ASUS Routers — ASUS Routers Improper Authentication Vulnerability

KEV · due 23 JunEPSS 99%public exploitSSVC actCVSS 9.8
critical.is priorityof 100
99
CVSS 9.8 (ADP)9.8 / 10 × 3029.4In CISA KEV+3030.0EPSS percentile 99.9.999 × 2020.0Exploit: SSVC active+1010.0SSVC exploitation: active+1010.0
Description · from the CVE record

The administrator application on ASUS GT-AC2900 devices before 3.0.0.4.386.42643 and Lyra Mini before 3.0.0.4_384_46630 allows authentication bypass when processing remote input from an unauthenticated user, leading to unauthorized access to the administrator interface. This relates to handle_request in router/httpd/httpd.c and auth_check in web_hook.o. An attacker-supplied value of '\0' matches the device's default value of '\0' in some situations. Note: All versions of Lyra Mini and earlier which are unsupported (End-of-Life, EOL) are also affected by this vulnerability, Consumers can mitigate this vulnerability by disabling the remote access features from WAN.

Affected

ProductAffectedFixed inSource
n/an/a–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: active · Automatable: yes · Technical impact: total

References

refasus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-Gaming-Routers/RT-AC2900/HelpDesk_BIOSrefgithub.com/atredispartners/advisories/blob/master/ATREDIS-2020-0010.mdrefatredis.com/blog/2021/4/30/asus-authentication-bypassrefasus.com/us/supportonly/lyra%20mini/helpdesk_biosrefcisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-32030kevcisa.gov/known-exploited-vulnerabilities-catalog