cbcvebase.
CVE-2021-27573
published 2021-05-07

CVE-2021-27573: An issue was discovered in Emote Remote Mouse through 4.0.0.0. Remote unauthenticated users can execute arbitrary code via crafted UDP packets with no prior…

PriorityP275critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EXPLOIT
EPSS
14.19%
96.1th percentile
An issue was discovered in Emote Remote Mouse through 4.0.0.0. Remote unauthenticated users can execute arbitrary code via crafted UDP packets with no prior authorization or authentication.

Affected

1 ranges
VendorProductVersion rangeFixed in
remotemouseemote_remote_mouse<= 4.0.0.0—

Detection & IOCsextracted from sources · hover to see the quote

url/lua/%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2f%2e%2ffind_prefs.lua.css
url/lua/.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2f.%2ffind_prefs.lua.css
pathfind_prefs.lua.css
  • →Detect path-traversal authentication bypass attempts against ntopng: look for HTTP GET requests to /lua/ containing long sequences of URL-encoded dot-slash (%2e%2f or .%2f) traversal sequences terminating in find_prefs.lua.css
  • →A successful exploitation response returns HTTP 200 with Content-Type header containing 'application/json' and a body containing all three of: '"results":', '"name":', '"tab":'
  • ·The template metadata references CVE-2021-28073 (ntopng authentication bypass) but the NVD source URL and CVE field in the query are for CVE-2021-27573 (Emote Remote Mouse RCE via UDP). These are two distinct vulnerabilities; the Nuclei template and its IOCs apply to ntopng (CVE-2021-28073), not to Emote Remote Mouse (CVE-2021-27573). ↗
  • ·The ntopng path-traversal bypass affects ntopng <= 4.2 only; versions 4.3 and later are not vulnerable.

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
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