CVE-2018-20969

Publication date 16 August 2019

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

do_ed_script in pch.c in GNU patch through 2.7.6 does not block strings beginning with a ! character. NOTE: this is the same commit as for CVE-2019-13638, but the ! syntax is specific to ed, and is unrelated to a shell metacharacter.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
patch	19.04 disco	Fixed 2.7.6-3ubuntu0.1
	18.04 LTS bionic	Fixed 2.7.6-2ubuntu1.1
	16.04 LTS xenial	Fixed 2.7.5-1ubuntu0.16.04.2
	14.04 LTS trusty	Fixed 2.7.1-4ubuntu2.4+esm1

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
patch	Upstream: ?id=3fc

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.8 · High

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	7.8 · High
Exploitability score	-
Impact score	-

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Other references

https://www.cve.org/CVERecord?id=CVE-2018-20969