cbcvebase.
CVE-2019-6971
published 2019-06-19

CVE-2019-6971: An issue was discovered on TP-Link TL-WR1043ND V2 devices. An attacker can send a cookie in an HTTP authentication packet to the router management web…

PriorityP272critical9.8CVSS 3.0
AVNACLPRNUINSUCHIHAH
EXPLOIT
EPSS
13.71%
96.0th percentile
An issue was discovered on TP-Link TL-WR1043ND V2 devices. An attacker can send a cookie in an HTTP authentication packet to the router management web interface, and fully control the router without knowledge of the credentials.

Affected

1 ranges
VendorProductVersion rangeFixed in
tp-linktl-wr1043nd_firmware——

Detection & IOCsextracted from sources · hover to see the quote

url/userRpm/LoginRpm.htm?Save=Save↗
  • →Detect unauthenticated access to the TP-Link management interface by looking for HTTP GET requests to /userRpm/LoginRpm.htm?Save=Save carrying a hardcoded Authorization cookie value (Basic%20QWRtaW5pc3RyYXRvcjpjM2JiNTI5NjdiNjVjYWY4ZWRkMWNiYjg4ZDcwYzYxMQ%3D%3D) without prior credential submission. ↗
  • →Flag HTTP GET requests where the Referer header matches http://<host>/userRpm/LoginRpm.htm?Save=Save and the Cookie header contains the static Authorization=Basic token — this pattern is the exact exploit replay sequence. ↗
  • →The exploit extracts a randomized session-ID token from the router's HTTP response by splitting on '/' and using index [3]; detect anomalous session token reuse or rapid session establishment without a preceding valid login flow. ↗
  • ·Exploit targets only TL-WR1043ND V2 hardware; the authentication bypass and associated cookie value may not apply to other TP-Link models or firmware versions. ↗

CVSS provenance

nvdv3.09.8CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.010.0CRITICALAV:N/AC:L/Au:N/C:C/I:C/A:C
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