THREATPORT/VULNERABILITY/CVE-2008-4299
MEDIUM SEVERITY

CVE-2008-4299

Internet Authentication Service Helper Com Component vulnerability

CVSS
5.0
EPSS
15.9%
EPSS pct
97th
Exploited
No known
A certain ActiveX control in the Microsoft Internet Authentication Service (IAS) Helper COM Component in iashlpr.dll allows remote attackers to cause a denial of service (browser crash) via a large integer value in the first argument to the PutProperty method. NOTE: this issue was disclosed by an unreliable researcher, so it might be incorrect.
Affected vendor
Microsoft
Affected product
Internet Authentication Service Helper Com Component
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness type (CWE)
Published
2008-09-29

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 15.9% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2008-4299

  • Confirm whether Microsoft Internet Authentication Service Helper Com Component is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2008-4299.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2008-4299

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2008-4299 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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