THREATPORT/VULNERABILITY/CVE-2018-1000807
HIGH SEVERITY

CVE-2018-1000807

Pyopenssl vulnerability

CVSS
8.1
EPSS
4.1%
EPSS pct
90th
Exploited
No known
Python Cryptographic Authority pyopenssl version prior to version 17.5.0 contains a CWE-416: Use After Free vulnerability in X509 object handling that can result in Use after free can lead to possible denial of service or remote code execution.. This attack appear to be exploitable via Depends on the calling application and if it retains a reference to the memory.. This vulnerability appears to have been fixed in 17.5.0.
Affected vendor
Pyopenssl
Affected product
Pyopenssl
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
Published
2018-10-08

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high 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 4.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2018-1000807

  • Confirm whether Pyopenssl Pyopenssl is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2018-1000807.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-1000807

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-1000807 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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