THREATPORT/VULNERABILITY/CVE-2021-31226
CRITICAL SEVERITY

CVE-2021-31226

Interniche vulnerability

CVSS
9.8
EPSS
3.2%
EPSS pct
87th
Exploited
No known
An issue was discovered in HCC embedded InterNiche 4.0.1. A potential heap buffer overflow exists in the code that parses the HTTP POST request, due to lack of size validation. This vulnerability requires the attacker to send a crafted HTTP POST request with a URI longer than 50 bytes. This leads to a heap overflow in wbs_post() via an strcpy() call.
Affected vendor
Hcc Embedded
Affected product
Interniche
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
Published
2021-08-19

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2021-31226

  • Confirm whether Hcc Embedded Interniche is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-31226.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-31226

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-31226 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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