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CVE-2017-18205

Publication date 27 February 2018

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

8.1 · High

Score breakdown

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.

Status

Package Ubuntu Release Status
zsh 17.10 artful
Fixed 5.2-5ubuntu1.1
16.04 LTS xenial
Fixed 5.1.1-1ubuntu2.1
14.04 LTS trusty
Fixed 5.0.2-3ubuntu6.1

Severity score breakdown

Parameter Value
Base score 8.1 · High
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

Other references