=========================================================================
Ubuntu Security Notice USN-4587-1
October 20, 2020

italc vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in iTALC.

Software Description:
- italc: didact tool which allows teachers to view and control computer labs

Details:

Nicolas Ruff discovered that iTALC had buffer overflows, divide-by-zero errors
and didn't check malloc return values. A remote attacker could use these issues
to cause a denial of service or possibly execute arbitrary code.
(CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055)

Josef Gajdusek discovered that iTALC had heap-based buffer overflow
vulnerabilities. A remote attacker could used these issues to cause a denial of
service or possibly execute arbitrary code. (CVE-2016-9941, CVE-2016-9942)

It was discovered that iTALC had an out-of-bounds write, multiple heap
out-of-bounds writes, an infinite loop, improper initializations, and null
pointer vulnerabilities. A remote attacker could used these issues to cause a
denial of service or possibly execute arbitrary code. (CVE-2018-15127,
CVE-2018-20019, CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-20023,
CVE-2018-20024, CVE-2018-20748, CVE-2018-20749, CVE-2018-20750, CVE-2018-7225,
CVE-2019-15681)

Update instructions:

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

Ubuntu 16.04 LTS:
  italc-client                    1:2.0.2+dfsg1-4ubuntu0.1
  italc-master                    1:2.0.2+dfsg1-4ubuntu0.1
  libitalccore                    1:2.0.2+dfsg1-4ubuntu0.1

In general, a standard system update will make all the necessary changes.

References:
  https://usn.ubuntu.com/4587-1
  CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054,
  CVE-2014-6055, CVE-2016-9941, CVE-2016-9942, CVE-2018-15127,
  CVE-2018-20019, CVE-2018-20020, CVE-2018-20021, CVE-2018-20022,
  CVE-2018-20023, CVE-2018-20024, CVE-2018-20748, CVE-2018-20749,
  CVE-2018-20750, CVE-2018-7225, CVE-2019-15681

Package Information:
  https://launchpad.net/ubuntu/+source/italc/1:2.0.2+dfsg1-4ubuntu0.1