CVE-2018-13259: Input Validation
First published: Wed Sep 05 2018(Updated: )
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.
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 | |
| redhat/zsh | <5.6 | 5.6 |
| debian/zsh | 5.8-6+deb11u1 5.9-4 5.9-8 |
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Reference Links
- https://access.redhat.com/errata/RHSA-2019:2017
- 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-2018-13259
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1626185
- http://www.zsh.org/mla/zsh-announce/136
- https://access.redhat.com/security/cve/cve-2018-13259
- https://bugzilla.redhat.com/show_bug.cgi?id=1626184
- https://security-tracker.debian.org/tracker/CVE-2018-13259
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-13259
- https://nvd.nist.gov/vuln/detail/CVE-2018-13259
- https://ubuntu.com/security/CVE-2018-13259
Frequently Asked Questions
What is CVE-2018-13259?
CVE-2018-13259 is a vulnerability in zsh before version 5.6 that allows shebang lines exceeding 64 characters to be truncated, potentially leading to an execve call to a program name that is a substring of the intended one.
How severe is CVE-2018-13259?
CVE-2018-13259 has a severity rating of 9.8 (critical).
Which software versions are affected by CVE-2018-13259?
The affected software versions include zsh 5.6-1 on Ubuntu, zsh 5.1.1-1ubuntu2.3 on Xenial, zsh 5.4.2-3ubuntu3.1 on Bionic, zsh 5.0.2-3ubuntu6.3 on Trusty, and zsh 5.6 on Red Hat.
How can I fix CVE-2018-13259?
To fix CVE-2018-13259, update zsh to version 5.6-1 on Ubuntu, version 5.1.1-1ubuntu2.3 on Xenial, version 5.4.2-3ubuntu3.1 on Bionic, version 5.0.2-3ubuntu6.3 on Trusty, or version 5.6 on Red Hat.
Where can I find more information about CVE-2018-13259?
You can find more information about CVE-2018-13259 on the MITRE CVE website, Ubuntu Security Notices, and the NIST National Vulnerability Database.
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