What’s Vulnerable › Vulnerabilities

CVE-2023-38321

• Severity: high (CVSS 7.5 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: 2023-12-25 · updated 2026-06-17
• Weakness: CWE-476

Description

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.

Affected products

• SierraWireless ALEOS: before 4.17.0.12 — fixed in 4.17.0.12

How to fix

Upgrade to a fixed version: SierraWireless ALEOS 4.17.0.12. Check the vendor advisory for 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

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