CVE-2019-9677

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-09-18 · updated 2026-06-17
Weakness: CWE-120

Description

The specific fields of CGI interface of some Dahua products are not strictly verified, an attacker can cause a buffer overflow by constructing malicious packets. Affected products include: IPC-HDW1X2X,IPC-HFW1X2X,IPC-HDW2X2X,IPC-HFW2X2X,IPC-HDW4X2X,IPC-HFW4X2X,IPC-HDBW4X2X,IPC-HDW5X2X,IPC-HFW5X2X for versions which Build time is before August 18, 2019.

Affected products

Dahuasecurity Ipc-Hdbw4X2X Firmware: before 2019-08-18 — fixed in 2019-08-18
Dahuasecurity Ipc-Hdw1X2X Firmware: before 2019-08-18 — fixed in 2019-08-18
Dahuasecurity Ipc-Hdw2X2X Firmware: before 2019-08-18 — fixed in 2019-08-18
Dahuasecurity Ipc-Hdw4X2X Firmware: before 2019-08-18 — fixed in 2019-08-18
Dahuasecurity Ipc-Hdw5X2X Firmware: before 2019-08-18 — fixed in 2019-08-18
Dahuasecurity Ipc-Hfw1X2X Firmware: before 2019-08-18 — fixed in 2019-08-18
Dahuasecurity Ipc-Hfw2X2X Firmware: before 2019-08-18 — fixed in 2019-08-18
Dahuasecurity Ipc-Hfw4X2X Firmware: before 2019-08-18 — fixed in 2019-08-18
Dahuasecurity Ipc-Hfw5X2X Firmware: before 2019-08-18 — fixed in 2019-08-18

How to fix

Upgrade to a fixed version: Dahuasecurity Ipc-Hdbw4X2X Firmware 2019-08-18; Dahuasecurity Ipc-Hdw1X2X Firmware 2019-08-18; Dahuasecurity Ipc-Hdw2X2X Firmware 2019-08-18; Dahuasecurity Ipc-Hdw4X2X Firmware 2019-08-18; Dahuasecurity Ipc-Hdw5X2X Firmware 2019-08-18; Dahuasecurity Ipc-Hfw1X2X Firmware 2019-08-18; Dahuasecurity Ipc-Hfw2X2X Firmware 2019-08-18; Dahuasecurity Ipc-Hfw4X2X Firmware 2019-08-18; Dahuasecurity Ipc-Hfw5X2X Firmware 2019-08-18. Check the vendor advisory for mitigations.

References

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