high
7.5
CWE
20
Advisory Published
Updated

CVE-2018-7549: Input Validation

First published: Tue Feb 27 2018(Updated: )

A flaw was found in zsh prior 5.4.2. There is a crash when copying empty hash table with typeset -p. Resources: <a href="https://sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438dd">https://sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438dd</a>

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Zsh Zsh<=5.4.2
Redhat Enterprise Linux Desktop=7.0
Redhat Enterprise Linux Server=7.0
Redhat Enterprise Linux Workstation=7.0
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=17.10
redhat/zsh<5.5
5.5
debian/zsh
5.8-6+deb11u1
5.9-4
5.9-8

Remedy

https://sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438dd

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Reference Links

Frequently Asked Questions

  • What is CVE-2018-7549?

    CVE-2018-7549 is a vulnerability in zsh through version 5.4.2 that can cause a crash during a copy of an empty hash table.

  • What is the severity of CVE-2018-7549?

    CVE-2018-7549 has a severity rating of 7.5 (High).

  • Which software versions are affected by CVE-2018-7549?

    The vulnerability affects zsh versions up to and including 5.4.2.

  • How can I fix CVE-2018-7549?

    To fix CVE-2018-7549, update zsh to version 5.5 or above.

  • Where can I find more information about CVE-2018-7549?

    More information about CVE-2018-7549 can be found at the following references: [CVE-2018-7549](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7549), [USN-3593-1](https://ubuntu.com/security/notices/USN-3593-1), [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-7549).

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