CVE-2018-7548: Null Pointer Dereference
First published: Tue Feb 27 2018(Updated: )
In subst.c in zsh through 5.4.2, there is a NULL pointer dereference when using ${(PA)...} on an empty array result.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Zsh Zsh | <=5.4.2 | |
| Canonical Ubuntu Linux | =17.10 | |
| debian/zsh | 5.8-6+deb11u1 5.9-4 5.9-8 |
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Reference Links
- https://security.gentoo.org/glsa/201805-10
- https://sourceforge.net/p/zsh/code/ci/110b13e1090bc31ac1352b28adc2d02b6d25a102
- https://usn.ubuntu.com/3593-1/
- https://launchpad.net/bugs/cve/CVE-2018-7548
- https://security-tracker.debian.org/tracker/CVE-2018-7548
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7548
- https://nvd.nist.gov/vuln/detail/CVE-2018-7548
- https://ubuntu.com/security/CVE-2018-7548
Frequently Asked Questions
What is CVE-2018-7548?
CVE-2018-7548 is a vulnerability in zsh through 5.4.2 that allows for a null pointer dereference when using ${(PA)...} on an empty array result.
What is the severity of CVE-2018-7548?
CVE-2018-7548 has a severity level of 9.8 (critical).
How does CVE-2018-7548 affect zsh?
CVE-2018-7548 affects zsh versions through 5.4.2.
How can I fix CVE-2018-7548 in zsh?
To fix CVE-2018-7548 in zsh, update to version 5.7.1-1+deb10u1, 5.8-6+deb11u1, 5.9-4, or 5.9-5.
Where can I find more information about CVE-2018-7548?
More information about CVE-2018-7548 can be found at the following references: [1] [2] [3].
- collector/nvd-index
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