THREATPORT/VULNERABILITY/CVE-2019-9891
CRITICAL SEVERITY

CVE-2019-9891

Advanced Bash Scripting Guide vulnerability

CVSS
9.8
EPSS
3.3%
EPSS pct
87th
Exploited
No known
The function getopt_simple as described in Advanced Bash Scripting Guide (ISBN 978-1435752184) allows privilege escalation and execution of commands when used in a shell script called, for example, via sudo.
Affected vendor
Tldp
Affected product
Advanced Bash Scripting Guide
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
2019-05-31

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 3.3% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2019-9891

  • Confirm whether Tldp Advanced Bash Scripting Guide is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-9891.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-9891

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-9891 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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