Security readout for executives and security teams
Plain-English summary
CVE-2020-37119 is a critical memory-corruption flaw in Nsasoft Nsauditor. Public sources name versions 3.0.28 and 3.2.1.0. A malicious DNS query payload can trigger code execution. Treat affected installations as high priority, especially on administrator workstations or systems with network reachability.
Executive priority
Prioritize within the current remediation cycle. The vulnerability is critical and has public exploit material, but provided sources do not confirm active exploitation. Focus first on administrator workstations and any systems where Nsauditor is exposed to untrusted network input.
Technical view
The issue is a CWE-121 stack-based buffer overflow in the Nsauditor DNS Lookup tool. The source bundle describes arbitrary code execution via memory overwrite, with SEH and ASLR bypass characteristics. CVSS 3.1 is 9.8, network vector, low complexity, no privileges, and no user interaction.
Likely exposure
Exposure is limited to environments running Nsasoft Nsauditor 3.0.28 or 3.2.1.0. Risk is highest where the DNS Lookup tool is installed, used, or reachable in workflows handling untrusted DNS-related input. Sources do not identify other affected products or versions.
Exploitation context
The CVE is not listed as CISA KEV in the provided data, so active exploitation is not established. However, a public ExploitDB reference is cited, indicating exploit details are publicly available. This increases urgency for inventory and containment.
Researcher notes
Evidence supports affected versions 3.0.28 and 3.2.1.0, CVSS 9.8, CWE-121, and public exploit publication. The provided sources do not name a fixed release, patch, or vendor mitigation. Avoid assuming broader product impact without additional vendor confirmation.
Mitigation direction
- Inventory endpoints and servers for Nsauditor installations.
- Identify any Nsauditor 3.0.28 or 3.2.1.0 instances.
- Check Nsasoft and advisory sources for fixed versions or vendor guidance.
- Stop using the DNS Lookup tool on affected versions until remediated.
- Restrict affected systems from untrusted networks where operationally possible.
- Remove affected software if it is not business-critical.
Validation and detection
- Confirm installed Nsauditor version on each discovered host.
- Verify whether the DNS Lookup tool is present or used.
- Document compensating controls applied to affected hosts.
- Recheck vendor and CVE sources for patch or mitigation updates.
- Confirm removal, upgrade, or accepted risk for every affected installation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-121: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution 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 lookupCVE-2020-37119 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-48350CVE reference · exploit
- Nsauditor HomepageCVE reference · product
- VulnCheck Advisory: Nsauditor 3.2.1.0 - Buffer Overflow (SEH+ASLR bypass (3 bytes overwrite))CVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.