THREATPORT/VULNERABILITY/CVE-2015-3008
MEDIUM SEVERITY

CVE-2015-3008

Asterisk vulnerability

CVSS
4.3
EPSS
46.2%
EPSS pct
99th
Exploited
No known
Asterisk Open Source 1.8 before 1.8.32.3, 11.x before 11.17.1, 12.x before 12.8.2, and 13.x before 13.3.2 and Certified Asterisk 1.8.28 before 1.8.28-cert5, 11.6 before 11.6-cert11, and 13.1 before 13.1-cert2, when registering a SIP TLS device, does not properly handle a null byte in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.
Affected vendor
Digium
Affected product
Asterisk
CVSS vector
AV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness type (CWE)
Published
2015-04-10

Risk analysis

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

Its EPSS score of 46.2% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it among the most exploited CVEs currently tracked.

Check your external exposure to CVE-2015-3008

  • Confirm whether Digium Asterisk is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2015-3008.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2015-3008

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2015-3008 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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