Linux Security
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    Linux Security

    ArchLinux: 201804-3: zziplib: denial of service

    Date 09 Apr 2018
    758
    Posted By Anthony Pell
    The package zziplib before version 0.13.69-1 is vulnerable to denial of service.
    Arch Linux Security Advisory ASA-201804-3
    =========================================
    
    Severity: Medium
    Date    : 2018-04-04
    CVE-ID  : CVE-2018-7725 CVE-2018-7726 CVE-2018-7727
    Package : zziplib
    Type    : denial of service
    Remote  : Yes
    Link    : https://security.archlinux.org/AVG-612
    
    Summary
    =======
    
    The package zziplib before version 0.13.69-1 is vulnerable to denial of
    service.
    
    Resolution
    ==========
    
    Upgrade to 0.13.69-1.
    
    # pacman -Syu "zziplib>=0.13.69-1"
    
    The problems have been fixed upstream in version 0.13.69.
    
    Workaround
    ==========
    
    None.
    
    Description
    ===========
    
    - CVE-2018-7725 (denial of service)
    
    An out of bounds read was found in function zzip_disk_fread of ZZIPlib
    before 0.13.69, when ZZIPlib mem_disk functionality is used. Remote
    attackers could leverage this vulnerability to cause a denial of
    service via a crafted zip file.
    
    - CVE-2018-7726 (denial of service)
    
    An improper input validation was found in function
    __zzip_fetch_disk_trailer of ZZIPlib before 0.13.69, that could lead to
    a crash in __zzip_parse_root_directory function of zzip/zip.c. Remote
    attackers could leverage this vulnerability to cause a denial of
    service via a crafted zip file.
    
    - CVE-2018-7727 (denial of service)
    
    A memory leak was found in unzip-mem.c and unzzip-mem.c of ZZIPlib
    before 0.13.69, that could lead to resource exhaustion. Local attackers
    could leverage this vulnerability to cause a denial of service via a
    crafted zip file.
    
    Impact
    ======
    
    A remote attacker can cause a denial of service via a specially crafted
    zip file.
    
    References
    ==========
    
    https://github.com/gdraheim/zziplib/issues/39
    https://github.com/gdraheim/zziplib/commit/1ba660b3300d67b8ce9f6b96bbae0b36fa2d6b06
    https://github.com/gdraheim/zziplib/issues/41
    https://github.com/gdraheim/zziplib/commit/19c9e4dc6c5cf92a38d0d23dbccac6993f9c41be
    https://github.com/gdraheim/zziplib/commit/feae4da1a5c92100c44ebfcbaaa895959cc0829b
    https://github.com/gdraheim/zziplib/issues/40
    https://github.com/gdraheim/zziplib/commit/83a2da55922f67e07f22048ac9671a44cc0d35c4
    https://security.archlinux.org/CVE-2018-7725
    https://security.archlinux.org/CVE-2018-7726
    https://security.archlinux.org/CVE-2018-7727
    

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