THREATPORT/VULNERABILITY/CVE-2007-4391
HIGH SEVERITY

CVE-2007-4391

Messenger vulnerability

CVSS
9.3
EPSS
9.3%
EPSS pct
95th
Exploited
No known
Heap-based buffer overflow in Kakadu kdu_v32m.dll in Yahoo! Messenger 8.1.0.413 allows remote attackers to cause a denial of service (application crash) via a certain length field in JPEG2000 data, as demonstrated by sending an "invite to view my webcam" request, and then injecting a DLL into the attacker's peer Yahoo! Messenger application when this request is accepted.
Affected vendor
Yahoo
Affected product
Messenger
CVSS vector
AV:N/AC:M/Au:N/C:C/I:C/A:C
Weakness type (CWE)
  • CWE-20 — Improper Input Validation
  • CWE-119 — Improper Restriction of Operations within Memory Bounds
Published
2007-08-17

Risk analysis

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

Its EPSS score of 9.3% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2007-4391

  • Confirm whether Yahoo Messenger is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2007-4391.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2007-4391

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2007-4391 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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