THREATPORT/VULNERABILITY/CVE-2008-3263
HIGH SEVERITY

CVE-2008-3263

Asterisk vulnerability

CVSS
7.8
EPSS
28.0%
EPSS pct
98th
Exploited
No known
The IAX2 protocol implementation in Asterisk Open Source 1.0.x, 1.2.x before 1.2.30, and 1.4.x before 1.4.21.2; Business Edition A.x.x, B.x.x before B.2.5.4, and C.x.x before C.1.10.3; AsteriskNOW; Appliance Developer Kit 0.x.x; and s800i 1.0.x before 1.2.0.1 allows remote attackers to cause a denial of service (call-number exhaustion and CPU consumption) by quickly sending a large number of IAX2 (IAX) POKE requests.
Affected vendor
Asterisk
Affected product
Asterisk
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:C
Weakness type (CWE)
Published
2008-07-22

Risk analysis

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

Its EPSS score of 28.0% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2008-3263

  • Confirm whether Asterisk Asterisk is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2008-3263.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2008-3263

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2008-3263 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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