HOMEVULNERABILITIESCVE-2023-38321
HIGH

CVE-2023-38321

CWE-476Published: December 25, 2023· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2023-38321 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

sierrawireless6 product(s)
aleoslx40lx60mp70rv50xrv55
Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://source.sierrawireless.com/-/media/support_downloads/security-bulletins/pdf/swi-psa-2023-006-r3.ashx
ADVISORYhttps://source.sierrawireless.com/-/media/support_downloads/security-bulletins/pdf/swi-psa-2023-006-r3.ashx

All References (6)

→
https://github.com/openNDS/openNDS/blob/master/ChangeLogRelease Notes
→
https://openwrt.org/docs/guide-user/services/captive-portal/openndsProduct
→
https://source.sierrawireless.com/-/media/support_downloads/security-bulletins/pdf/swi-psa-2023-006-r3.ashxVendor Advisory
→
https://github.com/openNDS/openNDS/blob/master/ChangeLogRelease Notes
→
https://openwrt.org/docs/guide-user/services/captive-portal/openndsProduct
→
https://source.sierrawireless.com/-/media/support_downloads/security-bulletins/pdf/swi-psa-2023-006-r3.ashxVendor Advisory

Quick Facts

CVE IDCVE-2023-38321
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-476
CISA KEVNo
Affected1 vendor(s)
PublishedDec 25, 2023

Related CVEs (CWE-476)

CVE-2022-36648
10.0
CVE-2010-2495
10.0
CVE-2017-17464
9.8
CVE-2015-8787
9.8
CVE-2017-5668
9.8
CVE-2017-17465
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-38321 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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