8.1
HIGH
CVE-2017-18205
"zsh Built-in NULL Pointer Dereference Vulnerability"
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.

INFO

Published Date :

Feb. 27, 2018, 10:29 p.m.

Last Modified :

Nov. 21, 2024, 3:19 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

2.2
Affected Products

The following products are affected by CVE-2017-18205 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Zsh zsh
1 Zsh_project zsh

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2017-18205 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2017-18205 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2018:3073
    Added Reference https://security.gentoo.org/glsa/201805-10
    Added Reference https://sourceforge.net/p/zsh/code/ci/eb783754bdb74377f3cea4ceca9c23a02ea1bf58
    Added Reference https://usn.ubuntu.com/3593-1/
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Oct. 31, 2018

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2018:3073 [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 21, 2018

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/201805-10 [No Types Assigned]
  • CVE Modified by [email protected]

    Mar. 21, 2018

    Action Type Old Value New Value
    Added Reference https://usn.ubuntu.com/3593-1/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Mar. 16, 2018

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:M/Au:N/C:P/I:P/A:P)
    Added CVSS V3 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://sourceforge.net/p/zsh/code/ci/eb783754bdb74377f3cea4ceca9c23a02ea1bf58 No Types Assigned https://sourceforge.net/p/zsh/code/ci/eb783754bdb74377f3cea4ceca9c23a02ea1bf58 Patch, Third Party Advisory
    Added CWE CWE-476
    Added CPE Configuration OR *cpe:2.3:a:zsh_project:zsh:*:*:*:*:*:*:*:* versions up to (excluding) 5.4
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2017-18205 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2017-18205 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.36 }} 0.00%

score

0.67928

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability