CVE-2020-14403 Memory corruption in n/a

What is CVE-2020-14403?

CVE-2020-14403 is a medium-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 17 Jun 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An issue was discovered in LibVNCServer before 0.9.13. libvncserver/hextile.c allows out-of-bounds access via encodings.

Weakness: CWE-787

Which versions are affected by CVE-2020-14403?

It affects 9 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Libvnc Project Libvncserver, Siemens Simatic Itc1500 Firmware, Siemens Simatic Itc1500 Pro Firmware, Siemens Simatic Itc1900 Firmware and 3 more.

How do I fix CVE-2020-14403?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2020-14403 being exploited?

There is no known exploitation of CVE-2020-14403 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2020-14403, GHSA-x76c-7x48-932f, UBUNTU-CVE-2020-14403.