OpenNDS, as used in Sierra Wireless ALEOS before 4.17.0.12 and other products, allows remote attackers to cause a denial of service (NULL pointer dereference, daemon crash, and Captive Portal outage) via a GET request to /opennds_auth/ that lacks a custom query string parameter and client-token.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Aleos | Sierrawireless | * | 4.17.0.12 (excluding) |
| Opennds | Ubuntu | bionic | * |
| Opennds | Ubuntu | lunar | * |
| Opennds | Ubuntu | mantic | * |
| Opennds | Ubuntu | trusty | * |
| Opennds | Ubuntu | upstream | * |
| Opennds | Ubuntu | xenial | * |
Potential Mitigations
References
- https://github.com/openNDS/openNDS/blob/master/ChangeLog
- https://openwrt.org/docs/guide-user/services/captive-portal/opennds
- https://source.sierrawireless.com/-/media/support_downloads/security-bulletins/pdf/swi-psa-2023-006-r3.ashx
- https://github.com/openNDS/openNDS/blob/master/ChangeLog
- https://openwrt.org/docs/guide-user/services/captive-portal/opennds
- https://source.sierrawireless.com/-/media/support_downloads/security-bulletins/pdf/swi-psa-2023-006-r3.ashx