RCE in Tldp Advanced Bash-Scripting Guide

CVE-2019-9891

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.

Vulnerability class: RCE (Remote Code Execution)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.034 (88.5th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2019-9891: held from 0.033 to 0.034.

EPSS over last 30 days · oldest: 0.033 · newest: 0.034 · change: +0.001

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-9891?
CVE-2019-9891 is a critical-severity vulnerability in Tldp Advanced Bash-Scripting Guide, classified under Code Injection. CVSS score: 9.8/10. Published 2019-05-31.
How severe is CVE-2019-9891?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2019-9891 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.