Linux Security
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    Linux Security

    Ubuntu 4617-1: SPICE vdagent vulnerabilities

    Date 04 Nov 2020
    188
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in SPICE vdagent.
    ==========================================================================
    Ubuntu Security Notice USN-4617-1
    November 04, 2020
    
    spice-vdagent vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 20.10
    - Ubuntu 20.04 LTS
    - Ubuntu 18.04 LTS
    
    Summary:
    
    Several security issues were fixed in SPICE vdagent.
    
    Software Description:
    - spice-vdagent: Spice agent for Linux
    
    Details:
    
    Matthias Gerstner discovered that SPICE vdagent incorrectly handled the
    active_xfers hash table. A local attacker could possibly use this issue to
    cause SPICE vdagent to consume memory, resulting in a denial of service.
    (CVE-2020-25650)
    
    Matthias Gerstner discovered that SPICE vdagent incorrectly handled the
    active_xfers hash table. A local attacker could possibly use this issue to
    cause SPICE vdagent to consume memory, resulting in a denial of service, or
    obtain sensitive file contents. (CVE-2020-25651)
    
    Matthias Gerstner discovered that SPICE vdagent incorrectly handled a large
    number of client connections. A local attacker could possibly use this
    issue to cause SPICE vdagent to consume resources, resulting in a denial of
    service. (CVE-2020-25652)
    
    Matthias Gerstner discovered that SPICE vdagent incorrectly handled client
    connections. A local attacker could possibly use this issue to obtain
    sensitive information, paste clipboard contents, and transfer files into
    the active session. (CVE-2020-25653)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 20.10:
      spice-vdagent                   0.20.0-1ubuntu0.1
    
    Ubuntu 20.04 LTS:
      spice-vdagent                   0.19.0-2ubuntu0.2
    
    Ubuntu 18.04 LTS:
      spice-vdagent                   0.17.0-1ubuntu2.2
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4617-1
      CVE-2020-25650, CVE-2020-25651, CVE-2020-25652, CVE-2020-25653
    
    Package Information:
      https://launchpad.net/ubuntu/+source/spice-vdagent/0.20.0-1ubuntu0.1
      https://launchpad.net/ubuntu/+source/spice-vdagent/0.19.0-2ubuntu0.2
      https://launchpad.net/ubuntu/+source/spice-vdagent/0.17.0-1ubuntu2.2
    
    

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