CVE-2017-18205: Null Pointer Dereference
First published: Tue Feb 27 2018(Updated: )
A flaw was found in zsh prior 5.3.1. There is a vulnerability when in sh compatibility mode if HOME was not set and cd was used with no argument. References: <a href="https://sourceforge.net/p/zsh/code/ci/eb783754bdb74377f3cea4ceca9c23a02ea1bf58">https://sourceforge.net/p/zsh/code/ci/eb783754bdb74377f3cea4ceca9c23a02ea1bf58</a>
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/zsh | <5.4 | 5.4 |
| debian/zsh | 5.8-6+deb11u1 5.9-4 5.9-8 | |
| SUSE Zsh | <5.4 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://access.redhat.com/errata/RHSA-2018:3073
- https://security.gentoo.org/glsa/201805-10
- https://sourceforge.net/p/zsh/code/ci/eb783754bdb74377f3cea4ceca9c23a02ea1bf58
- https://usn.ubuntu.com/3593-1/
- https://launchpad.net/bugs/cve/CVE-2017-18205
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1549862#c0
- https://bugzilla.redhat.com/show_bug.cgi?id=1549862
- https://security-tracker.debian.org/tracker/CVE-2017-18205
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18205
- https://nvd.nist.gov/vuln/detail/CVE-2017-18205
- https://ubuntu.com/security/CVE-2017-18205
Frequently Asked Questions
What is CVE-2017-18205?
CVE-2017-18205 is a vulnerability in zsh that allows for a NULL pointer dereference during processing of the cd command with no argument if HOME is not set.
What is the severity of CVE-2017-18205?
CVE-2017-18205 has a severity rating of 8.1, which is considered high.
How does CVE-2017-18205 impact zsh?
CVE-2017-18205 could potentially lead to a NULL pointer dereference in zsh if the cd command is used without any argument and HOME is not set.
Which versions of zsh are affected by CVE-2017-18205?
The following versions of zsh are affected by CVE-2017-18205: 5.1.1-1ubuntu2.1, 5.2-5ubuntu1.1, 5.7.1-1+deb10u1, 5.8-6+deb11u1, 5.9-4, 5.9-5, and 5.4.
How can I fix CVE-2017-18205?
To fix CVE-2017-18205, you should update zsh to a version that includes the necessary security patches, such as 5.1.1-1ubuntu2.1, 5.2-5ubuntu1.1, 5.7.1-1+deb10u1, 5.8-6+deb11u1, 5.9-4, 5.9-5, or a version higher than 5.4.
- agent/type
- collector/launchpad-cve
- source/Launchpad
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2017-18205
- agent/software-canonical-lookup
- agent/remedy
- collector/mitre-cve
- source/MITRE
- agent/weakness
- agent/last-modified-date
- agent/severity
- collector/security-tracker-debian
- source/Debian
- collector/usn-cve
- source/Ubuntu
- agent/references
- agent/description
- agent/first-publish-date
- agent/event
- agent/source
- agent/softwarecombine
- agent/tags
- agent/author
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-index
- package-manager/redhat
- package-manager/debian
- vendor/zsh project
- canonical/suse zsh