CVE-2018-20969
7.8 · HIGHdo_ed_script in pch.c in GNU patch through 2.7.6 does not block strings beginning with a !
Overview
CVE-2018-20969 is a high-severity vulnerability. It was published on August 16, 2019 and has a CVSS 3.0 base score of 7.8 (HIGH).
This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
References
How CyberStrike helps
Reason, not just scan
It reasons through your app's logic the way a human pentester would, so it finds flaws signature scanners miss.
Learn moreVerified findings
Every finding is proven exploitable before you see it, which cuts the false positives that bury real risk.
Learn moreAI-driven DAST and SAST
Probe running apps and read source from one engine, so issues are caught before and after they ship.
Learn moreOpen source
Read exactly how it tests and what it reports. CyberStrike is open source and in early access.
View the repo
Frequently asked questions
What is CVE-2018-20969?
CVE-2018-20969 is a high-severity vulnerability. It was published on August 16, 2019 and has a CVSS 3.0 base score of 7.8 (HIGH).
How severe is CVE-2018-20969?
This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2018-20969?
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2018-20969?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-20969 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.
Related HIGH CVEs from 2018
View all- 8.9CVE-2018-1774
IBM API Connect 5.0.0.0, 5.0.8.4, 2018.1 and 2018.3.6 is vulnerable to CSV injection via the develop
View details - 8.8CVE-2018-3814
Craft CMS 2.6.3000 allows remote attackers to execute arbitrary PHP code by using the "Assets->Uploa
View details - 8.8CVE-2017-1000450
In opencv/modules/imgcodecs/src/utils.cpp, functions FillUniColor and FillUniGray do not check the i
View details - 8.8CVE-2017-1000456
freedesktop.org libpoppler 0.60.1 fails to validate boundaries in TextPool::addWord, leading to over
View details - 8.8CVE-2017-1000422
Gnome gdk-pixbuf 2.36.8 and older is vulnerable to several integer overflow in the gif_get_lzw funct
View details - 8.8CVE-2018-4862
In Octopus Deploy versions 3.2.11 - 4.1.5 (fixed in 4.1.6), an authenticated user with ProcessEdit p
View details - 8.8CVE-2017-1000496
Commsy version 9.0.0 is vulnerable to XXE attacks in the configuration import functionality resultin
View details - 8.8CVE-2017-1000499
phpMyAdmin versions 4.7.x (prior to 4.7.6.1/4.7.7) are vulnerable to a CSRF weakness. By deceiving a
View details - 8.8CVE-2017-1000479
pfSense versions 2.4.1 and lower are vulnerable to clickjacking attacks in the CSRF error page resul
View details - 8.8CVE-2017-1672
IBM Tivoli Key Lifecycle Manager 2.6 and 2.7 is vulnerable to cross-site request forgery which could
View details - 8.8CVE-2017-17867
Inteno iopsys 2.0-3.14 and 4.0 devices allow remote authenticated users to execute arbitrary OS comm
View details - 8.8CVE-2017-16666
Xplico before 1.2.1 allows remote authenticated users to execute arbitrary commands via shell metach
View details