National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2017-18205 Detail

Current 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.

Source:  MITRE
Description Last Modified:  02/27/2018
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 8.1 HIGH
Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H (V3 legend)
Impact Score: 5.9
Exploitability Score: 2.2

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 6.8 MEDIUM
Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P) (V2 legend)
Impact Subscore: 6.4
Exploitability Subscore: 8.6

Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Partial
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://access.redhat.com/errata/RHSA-2018:3073
https://security.gentoo.org/glsa/201805-10
https://sourceforge.net/p/zsh/code/ci/eb783754bdb74377f3cea4ceca9c23a02ea1bf58 Patch Third Party Advisory
https://usn.ubuntu.com/3593-1/

Technical Details

Vulnerability Type (View All)

  • NULL Pointer Dereference (CWE-476)

Vulnerable software and versions Switch to CPE 2.2

Configuration 1
OR
cpe:2.3:a:zsh_project:zsh:*:*:*:*:*:*:*:*    versions up to (excluding) 5.4

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

4 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-18205
NVD Published Date:
02/27/2018
NVD Last Modified:
10/31/2018