Qt: Denial of Service -- Remote/Unauthenticated

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.3135
                      USN-5081-1: Qt vulnerabilities
                             17 September 2021

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

Product:           Qt
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-38593 CVE-2020-17507 

Reference:         ESB-2021.1719
                   ESB-2021.1303

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-5081-1

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USN-5081-1: Qt vulnerabilities
16 September 2021

Several security issues were fixed in Qt.
Releases

  o Ubuntu 18.04 LTS

Packages

  o qtbase-opensource-src - Qt 5 libraries

Details

It was discovered that Qt incorrectly handled certain XBM image files. If a
user or automated system were tricked into opening a specially crafted PPM
file, a remote attacker could cause Qt to crash, resulting in a denial of
service. ( CVE-2020-17507 )

It was discovered that Qt incorrectly handled certain graphics operations.
If a user or automated system were tricked into performing certain graphics
operations, a remote attacker could cause Qt to crash, resulting in a
denial of service. ( CVE-2021-38593 )

Update instructions

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

Ubuntu 18.04

  o libqt5core5a - 5.9.5+dfsg-0ubuntu2.6
  o libqt5gui5 - 5.9.5+dfsg-0ubuntu2.6

After a standard system update you need to restart your session to make all
the necessary changes.

References

  o CVE-2021-38593
  o CVE-2020-17507

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