CVE-2018-0502

Publication date 5 September 2018

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

Description

An issue was discovered in zsh before 5.6. The beginning of a #! script file was mishandled, potentially leading to an execve call to a program named on the second line.

Status

Package Ubuntu Release Status
zsh 18.04 LTS bionic
Fixed 5.4.2-3ubuntu3.1
16.04 LTS xenial
Fixed 5.1.1-1ubuntu2.3
14.04 LTS trusty
Fixed 5.0.2-3ubuntu6.3

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
zsh

Severity score breakdown

Parameter Value
Base score 9.8 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-3764-1
    • Zsh vulnerabilities
    • 11 September 2018

Other references