CVE-2018-0502: Input Validation
First published: Wed Sep 05 2018(Updated: )
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.
Credit: security@debian.org security@debian.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Zsh Zsh | <5.6 | |
| debian/zsh | 5.8-6+deb11u1 5.9-4 5.9-8 |
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Reference Links
- https://bugs.debian.org/908000
- https://lists.debian.org/debian-lts-announce/2020/12/msg00000.html
- https://security.gentoo.org/glsa/201903-02
- https://sourceforge.net/p/zsh/code/ci/1c4c7b6a4d17294df028322b70c53803a402233d
- https://usn.ubuntu.com/3764-1/
- https://www.zsh.org/mla/zsh-announce/136
- https://launchpad.net/bugs/cve/CVE-2018-0502
- https://security-tracker.debian.org/tracker/CVE-2018-0502
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0502
- https://nvd.nist.gov/vuln/detail/CVE-2018-0502
- https://ubuntu.com/security/CVE-2018-0502
Frequently Asked Questions
What is the severity of CVE-2018-0502?
The severity of CVE-2018-0502 is critical, with a CVSS score of 9.8.
How does CVE-2018-0502 affect zsh?
CVE-2018-0502 affects zsh versions before 5.6.
Can CVE-2018-0502 lead to arbitrary code execution?
Yes, CVE-2018-0502 can potentially lead to arbitrary code execution.
Which operating systems are affected by CVE-2018-0502?
CVE-2018-0502 affects Canonical Ubuntu Linux versions 14.04, 16.04, and 18.04.
How can I fix CVE-2018-0502?
To fix CVE-2018-0502, upgrade zsh to version 5.6 or higher.
- collector/nvd-index
- agent/type
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- source/Launchpad
- agent/first-publish-date
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- collector/security-tracker-debian
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- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/14.04
- version/canonical ubuntu linux/16.04
- version/canonical ubuntu linux/18.04
- vendor/zsh
- canonical/zsh zsh
- package-manager/debian