THREATPORT/VULNERABILITY/CVE-2009-4491
CRITICAL SEVERITY

CVE-2009-4491

Thttpd vulnerability

CVSS
9.8
EPSS
13.5%
EPSS pct
96th
Exploited
No known
thttpd 2.25b0 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.
Affected vendor
Acme
Affected product
Thttpd
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-20 — Improper Input Validation
  • CWE-94 — Code Injection
Published
2010-01-13

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 13.5% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2009-4491

  • Confirm whether Acme Thttpd is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2009-4491.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2009-4491

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2009-4491 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2009-4491?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2009-4491.

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