THREATPORT/VULNERABILITY/CVE-2017-12933
CRITICAL SEVERITY

CVE-2017-12933

Php vulnerability

CVSS
9.8
EPSS
6.9%
EPSS pct
93th
Exploited
No known
The finish_nested_data function in ext/standard/var_unserializer.re in PHP before 5.6.31, 7.0.x before 7.0.21, and 7.1.x before 7.1.7 is prone to a buffer over-read while unserializing untrusted data. Exploitation of this issue can have an unspecified impact on the integrity of PHP.
Affected vendor
Php
Affected product
Php
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
Published
2017-08-18

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 6.9% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2017-12933

  • Confirm whether Php Php is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2017-12933.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-12933

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-12933 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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