THREATPORT/VULNERABILITY/CVE-2018-1000140
CRITICAL SEVERITY

CVE-2018-1000140

Librelp vulnerability

CVSS
9.8
EPSS
9.7%
EPSS pct
95th
Exploited
No known
rsyslog librelp version 1.2.14 and earlier contains a Buffer Overflow vulnerability in the checking of x509 certificates from a peer that can result in Remote code execution. This attack appear to be exploitable a remote attacker that can connect to rsyslog and trigger a stack buffer overflow by sending a specially crafted x509 certificate.
Affected vendor
Rsyslog
Affected product
Librelp
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
2018-03-23

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 9.7% 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-2018-1000140

  • Confirm whether Rsyslog Librelp is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2018-1000140.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-1000140

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-1000140 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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