What’s Vulnerable › Vulnerabilities

CVE-2018-20181

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 8.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-03-15 · updated 2026-06-17
• Weakness: CWE-191

Description

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

Affected products

• Debian Linux: 8.0, 9.0
• rdesktop: through 1.8.3

References

• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00040.html
• http://www.securityfocus.com/bid/106938
• https://github.com/rdesktop/rdesktop/commit/4dca546d04321a610c1835010b5dad85163b65e1
• https://lists.debian.org/debian-lts-announce/2019/02/msg00030.html
• https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/
• https://security.gentoo.org/glsa/201903-06
• https://www.debian.org/security/2019/dsa-4394
• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00040.html
• http://www.securityfocus.com/bid/106938
• https://github.com/rdesktop/rdesktop/commit/4dca546d04321a610c1835010b5dad85163b65e1
• https://lists.debian.org/debian-lts-announce/2019/02/msg00030.html
• https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/

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