CVE-2018-20177 Integer overflow in n/a

What is CVE-2018-20177?

CVE-2018-20177 is a critical vulnerability in Debian Debian Linux, published on 15 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

rdesktop versions up to and including v1.8.3 contain an Integer Overflow that leads to a Heap-Based Buffer Overflow in the function rdp_in_unistr() and results in memory corruption and possibly even a remote code execution.

Weakness: CWE-787, CWE-190

Which versions are affected by CVE-2018-20177?

It affects 4 products.

Products include Debian Debian Linux, Opensuse Backports, Opensuse Leap, Rdesktop Rdesktop.

How do I fix CVE-2018-20177?

Upgrade to a fixed version.

Is CVE-2018-20177 being exploited?

There is no known exploitation of CVE-2018-20177 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

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

Also known as ALPINE-CVE-2018-20177, DEBIAN-CVE-2018-20177, GHSA-5cx7-5prr-62vr, UBUNTU-CVE-2018-20177.