DrayTek VigorConnect - LFI (CVE-2021-20124)
Description
A local file inclusion vulnerability exists in DrayTek VigorConnect 1.6.0-B3 in the file download functionality of the WebServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.
psychologyCrowdSec Analysis
CVE-2021-20124 is a vulnerability present in DrayTek VigorConnect that allows unauthenticated attackers to perform local file inclusion through the WebServlet endpoint, which could enable the unauthorized download of arbitrary files with elevated privileges.
CrowdSec has been tracking this vulnerability and its exploits since 24th of September 2024.
According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2021-20124 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. CrowdSec data also reveals a clear uptick in attacks involving CVE-2021-20124 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.
Exploitation attempts typically involve requests to URLs containing both acsserver/webservlet and act=getmapimg_acs2.
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| Event | Date |
|---|---|
| CVE Published | 2021-10-13 |
| CISA KEV | 2024-09-03 |
| Rule Released | 2024-09-24 |
| CISA Remediation Deadline | 2024-09-24 |
| CrowdSec First Seen | 2024-11-23 |