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AUSCERT External Security Bulletin Redistribution
ESB-2018.2718
Zsh vulnerabilities
12 September 2018
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AusCERT Security Bulletin Summary
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Product: zsh
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-13259 CVE-2018-1100 CVE-2018-0502
Reference: ESB-2018.2714
ESB-2018.1803
Original Bulletin:
http://www.ubuntu.com/usn/usn-3764-1
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USN-3764-1: Zsh vulnerabilities
11 September 2018
zsh vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o Ubuntu 14.04 LTS
Summary
Zsh could be made to execute arbitrary code if it received a specially crafted
script.
Software Description
o zsh - shell with lots of features
Details
It was discovered that Zsh incorrectly handled certain scripts. An attacker
could possibly use this issue to execute arbitrary code. (CVE-2018-0502,
CVE-2018-13259)
Richard Maciel Costa discovered that Zsh incorrectly handled certain scripts.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2018-1100)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04 LTS
zsh - 5.4.2-3ubuntu3.1
Ubuntu 16.04 LTS
zsh - 5.1.1-1ubuntu2.3
Ubuntu 14.04 LTS
zsh - 5.0.2-3ubuntu6.3
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart Zsh to make all the
necessary changes.
References
o CVE-2018-0502
o CVE-2018-1100
o CVE-2018-13259
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