CVE-2017-18205

Description

In builtin.c in zsh before 5.4, when sh compatibility mode is used, there is a NULL pointer dereference during processing of the cd command with no argument if HOME is not set.

Category

8.1
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.26%
Vendor Advisory ubuntu.com Vendor Advisory gentoo.org Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://sourceforge.net/p/zsh/code/ci/eb783754bdb74377f3cea4ceca9c23a02ea1bf58 third party advisory patch
https://usn.ubuntu.com/3593-1/ vendor advisory
https://security.gentoo.org/glsa/201805-10 vendor advisory
https://access.redhat.com/errata/RHSA-2018:3073 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-18205?
CVE-2017-18205 has been scored as a high severity vulnerability.
How to fix CVE-2017-18205?
To fix CVE-2017-18205, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-18205 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-18205 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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