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CVE Record

CVE-2020-25928: The DNS feature in InterNiche NicheStack TCP/IP 4.0.1 is affected by: Buffer Overflow.

The DNS feature in InterNiche NicheStack TCP/IP 4.0.1 is affected by: Buffer Overflow. The impact is: execute arbitrary code (remote). The component is: DNS response processing functions: dns_upcall(), getoffset(), dnc_set_answer(). The attack vector is: a specific DNS response packet. The code does not check the "response data length" field of individual DNS answers, which may cause out-of-bounds read/write operations, leading to Information leak, Denial-or-Service, or Remote Code Execution, depending on the context.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2020-25928 is a buffer overflow in the DNS handling code of InterNiche NicheStack TCP/IP 4.0.1. A crafted DNS response can cause memory corruption, with possible information leak, denial of service, or remote code execution depending on the device context.

Executive priority

Treat this as a high-priority embedded/OT exposure review, especially where devices rely on DNS and cannot be patched quickly. Business urgency depends on whether affected NicheStack-based products exist in the environment and whether DNS traffic can reach them.

Technical view

The issue is in DNS response processing functions dns_upcall(), getoffset(), and dnc_set_answer(). The code reportedly fails to validate the response data length field for individual DNS answers, allowing out-of-bounds read or write behavior during DNS response parsing.

Likely exposure

Exposure is most likely in embedded, industrial, or operational technology products that include InterNiche NicheStack TCP/IP 4.0.1 and use its DNS feature. The provided sources do not identify specific device vendors, models, firmware versions, or CPEs.

Exploitation context

The source bundle describes a remote attack vector using a specific DNS response packet. It does not cite public exploitation, and the CVE is not marked as CISA KEV in the provided data.

Researcher notes

Evidence is strong for the vulnerable component and bug class, but incomplete for product-level exposure, scoring, and fixes. Avoid assuming exploitability on every device because impact depends on integration, memory layout, DNS reachability, and vendor firmware behavior.

Mitigation direction

  • Inventory embedded and OT assets for NicheStack TCP/IP 4.0.1 usage.
  • Check device vendor, CERT/CC, and CVE guidance for available fixes.
  • Limit DNS traffic to trusted resolvers where operationally possible.
  • Segment affected OT networks from untrusted or user-controlled networks.
  • Monitor vendors for firmware updates or product-specific mitigations.

Validation and detection

  • Confirm whether assets use InterNiche NicheStack TCP/IP 4.0.1.
  • Review firmware SBOMs, vendor advisories, and procurement records.
  • Identify devices with DNS functionality enabled or required.
  • Map whether untrusted DNS responses can reach those devices.
  • Document vendor patch status and compensating network controls.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2020-25928 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.