CVE-2021-46379

published 2022-03-04

CVE-2021-46379: DLink DIR850 ET850-1.08TRb03 is affected by an incorrect access control vulnerability through URL redirection to untrusted site.

Priority P2 79 medium 6.1 CVSS 3.1

AV N AC L PR N UI R S C C L I L A N

ITW EXPLOIT VulnCheck KEV

DLink DIR850 ET850-1.08TRb03 is affected by an incorrect access control vulnerability through URL redirection to untrusted site.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
dlink	dir-850l_firmware	—	—

Detection & IOCs extracted from sources · hover to see the quote

url /boafrm/formWlanRedirect?redirect-url=http://interact.sh&wlan_id=1↗

path /boafrm/formWlanRedirect↗

• → Detect open redirect exploitation attempts by monitoring HTTP GET requests to the path /boafrm/formWlanRedirect with a user-supplied redirect-url parameter pointing to an external/untrusted host. ↗
• → The vulnerability requires no authentication (PR:N) and affects D-Link DIR-850L firmware version ET850-1.08TRb03; prioritize detection on internet-exposed D-Link DIR-850 devices running this firmware version. ↗

• · The exploit requires only a single unauthenticated GET request; no session or credentials are needed, meaning any network-level access to the device's web interface is sufficient to trigger the redirect. ↗
• · The redirect-url parameter is fully attacker-controlled; detection rules should flag any external domain value in this parameter, not just known-bad domains like interact.sh used in the PoC template. ↗

CVSS provenance

nvd v3.1 6.1 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

nvd v2.0 5.8 MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:N

vulncheck 6.1 MEDIUM

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