USN-4547-1: iTALC vulnerabilities

Releases

• Ubuntu 18.04 ESM

Packages

• italc - didact tool which allows teachers to view and control computer labs

Details

It was discovered that an information disclosure vulnerability existed in the
LibVNCServer vendored in iTALC when sending a ServerCutText message. An
attacker could possibly use this issue to expose sensitive information.
(CVE-2019-15681)

It was discovered that the LibVNCServer and LibVNCClient vendored in iTALC
incorrectly handled certain packet lengths. A remote attacker could possibly
use this issue to obtain sensitive information, cause a denial of service, or
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 18.04

• italc-client - 1:3.0.3+dfsg1-3ubuntu0.1
• italc-master - 1:3.0.3+dfsg1-3ubuntu0.1
• libitalccore - 1:3.0.3+dfsg1-3ubuntu0.1

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

References

• 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

Related notices

• USN-3877-1: libvncserver-dev, libvncserver0, libvncserver, libvncserver1, libvncclient1, linuxvnc, libvncserver-config
• USN-4587-1: italc-client, italc-management-console, italc-master, italc, libitalccore
• USN-4547-2: ssvnc
• USN-3618-1: libvncserver-dev, libvncserver0, libvncserver, libvncserver1, libvncclient1, linuxvnc, libvncserver-config
• USN-4573-1: vino
• USN-4407-1: libvncserver-dev, libvncserver, libvncserver1, libvncclient1, libvncserver-config