CVE-2018-13259

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. Shebang lines exceeding 64 characters were truncated, potentially leading to an execve call to a program name that is a substring of the intended one.

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

CVSS version: CVSS v3.0

Base score 9.8 · Critical

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

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