ESB-2020.3456 – [Ubuntu] spice: Execute arbitrary code/commands – Existing account

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.3456
                      USN-4572-1: Spice vulnerability
                              7 October 2020

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           spice
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-14355  

Reference:         ESB-2020.3455

Original Bulletin: 
   https://usn.ubuntu.com/4572-1/

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USN-4572-1: Spice vulnerability
06 October 2020

Spice could be made to crash or run programs if it received specially
crafted network traffic.
Releases

  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS

Packages

  o spice - SPICE protocol client and server library

Details

Frediano Ziglio discovered that Spice incorrectly handled QUIC image
decoding. A remote attacker could use this to cause Spice to crash,
resulting in a denial of service, or possibly execute arbitrary code.

Update instructions

The problem can be corrected by updating your system to the following package
versions:

Ubuntu 20.04

  o libspice-server1 - 0.14.2-4ubuntu3.1

Ubuntu 18.04

  o libspice-server1 - 0.14.0-1ubuntu2.5

Ubuntu 16.04

  o libspice-server1 - 0.12.6-4ubuntu0.5

After a standard system update you need to restart qemu guests to make all
the necessary changes.

References

  o CVE-2020-14355

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