CVE-2022-29322

published 2022-05-10

CVE-2022-29322: D-Link DIR-816 A2_v1.10CNB04 was discovered to contain a stack overflow via the IPADDR and nvmacaddr parameters in /goform/form2Dhcpip.

Priority P2 65 critical 9.8 CVSS 3.1

AV N AC L PR N UI N S U C H I H A H

D-Link DIR-816 A2_v1.10CNB04 was discovered to contain a stack overflow via the IPADDR and nvmacaddr parameters in /goform/form2Dhcpip.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
dlink	dir-816_firmware	—	—

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

url /goform/form2Dhcpip↗

snort

alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS D-Link form2Dhcpip Multiple Parameters Buffer Overflow Attempt (CVE-2022-29322)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/goform/form2Dhcpip"; fast_pattern; http.request_body; pcre:"/(?:ip|nvmac)addr\x3d[^&]{100,}(?:&|$)/"; reference:url,www.cve.org/CVERecord?id=CVE-2022-29322; reference:cve,2022-29322; classtype:web-application-attack; sid:2065799; rev:1; metadata:affected_product D_Link, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_11_17, cve CVE_2022_29322, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_17, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)

• → Exploit traffic uses HTTP POST method targeting the /goform/form2Dhcpip endpoint on the device.
• → Overflow is triggered via the 'ipaddr' or 'nvmacaddr' POST body parameters containing 100 or more characters (oversized input), detectable via the PCRE pattern matching either parameter with a long value.
• → Attack targets D-Link DIR-816 A2_v1.10CNB04 networking equipment; traffic is expected in plaintext (non-TLS) and should be monitored at the network perimeter and internally.
• → The vulnerable parameters are IPADDR and nvmacaddr passed to the form2Dhcpip handler, which causes a stack overflow. ↗

• · The Snort/Suricata rule (ET sid:2065799) targets $HOME_NET as the destination, meaning it is designed to detect inbound exploitation attempts against internal D-Link devices. Ensure $HOME_NET is correctly scoped to include the device management network.
• · The PCRE threshold for overflow detection is set at 100+ characters for the parameter value. Legitimate DHCP IP/MAC values are far shorter; false positives from this rule should be extremely rare.

CVSS provenance

nvd v3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 10.0 CRITICAL AV:N/AC:L/Au:N/C:C/I:C/A:C

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-787