CVE-2020-37119
Nsauditor 3.2.1.0 - Buffer Overflow (SEH+ASLR bypass (3 bytes overwrite))
Description
Nsauditor 3.0.28 and 3.2.1.0 contains a buffer overflow vulnerability in the DNS Lookup tool that allows attackers to execute arbitrary code by overwriting memory. Attackers can craft a malicious DNS query payload to trigger a three-byte overwrite, bypass ASLR, and execute shellcode through a carefully constructed exploit.
INFO
Published Date :
Feb. 5, 2026, 5:16 p.m.
Last Modified :
Feb. 5, 2026, 8:47 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2020-37119
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Nsauditor to a version that addresses the buffer overflow.
- Avoid using the DNS Lookup tool with untrusted DNS queries.
- Apply vendor patches immediately to prevent exploitation.
- Implement input validation for DNS queries.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-37119.
| URL | Resource |
|---|---|
| https://www.exploit-db.com/exploits/48350 | |
| https://www.nsauditor.com/ | |
| https://www.vulncheck.com/advisories/nsauditor-buffer-overflow-sehaslr-bypass-bytes-overwrite |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-37119 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-37119
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-37119 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-37119 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Feb. 05, 2026
Action Type Old Value New Value Added Description Nsauditor 3.0.28 and 3.2.1.0 contains a buffer overflow vulnerability in the DNS Lookup tool that allows attackers to execute arbitrary code by overwriting memory. Attackers can craft a malicious DNS query payload to trigger a three-byte overwrite, bypass ASLR, and execute shellcode through a carefully constructed exploit. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-121 Added Reference https://www.exploit-db.com/exploits/48350 Added Reference https://www.nsauditor.com/ Added Reference https://www.vulncheck.com/advisories/nsauditor-buffer-overflow-sehaslr-bypass-bytes-overwrite