Linux Security
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    Linux Security

    Debian LTS: DLA-2470-1: zsh security update

    Date 30 Nov 2020
    590
    Posted By LinuxSecurity Advisories
    Several security vulnerabilities were found and corrected in zsh, a powerful shell and scripting language. Off-by-one errors, wrong parsing of shebang lines and buffer overflows may lead to unexpected behavior. A local, unprivileged user can create a specially crafted message file or directory path. If the
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    Debian LTS Advisory DLA-2470-1                This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/lts/security/                      Markus Koschany
    November 30, 2020                             https://wiki.debian.org/LTS
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    Package        : zsh
    Version        : 5.3.1-4+deb9u4
    CVE ID         : CVE-2017-18206 CVE-2018-0502 CVE-2018-1071 CVE-2018-1083 
                     CVE-2018-1100 CVE-2018-13259 CVE-2019-20044
    Debian Bug     : 908000 894044 894043 895225 951458
    
    Several security vulnerabilities were found and corrected in zsh, a powerful
    shell and scripting language. Off-by-one errors, wrong parsing of shebang lines
    and buffer overflows may lead to unexpected behavior. A local, unprivileged
    user can create a specially crafted message file or directory path. If the
    receiving user is privileged or traverses the aforementioned path, this leads
    to privilege escalation.
    
    For Debian 9 stretch, these problems have been fixed in version
    5.3.1-4+deb9u4.
    
    We recommend that you upgrade your zsh packages.
    
    For the detailed security status of zsh please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/zsh
    
    Further information about Debian LTS security advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://wiki.debian.org/LTS
    

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