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Vulnerabilities / CVE-2018-20181

critical

CVE-2018-20181

rdesktop: Remote code execution in seamless_process

Published Modified CWE 191, 787
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat7.5CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Red Hat (medium), Ubuntu (medium).

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 packages and fixed versions

SourcePackageFixed in
alpine 3.10rdesktop1.8.6-r0
alpine 3.11rdesktop1.8.6-r0
alpine 3.12rdesktop1.8.6-r0
alpine 3.13rdesktop1.8.6-r0
alpine 3.14rdesktop1.8.6-r0
alpine 3.15rdesktop1.8.6-r0
alpine 3.16rdesktop1.8.6-r0
alpine 3.17rdesktop1.8.6-r0
alpine 3.18rdesktop1.8.6-r0
alpine 3.19rdesktop1.8.6-r0
alpine 3.20rdesktop1.8.6-r0
alpine 3.21rdesktop1.8.6-r0
Show all 25 entries from 25 sources
SourcePackageFixed in
alpine 3.10rdesktop1.8.6-r0
alpine 3.11rdesktop1.8.6-r0
alpine 3.12rdesktop1.8.6-r0
alpine 3.13rdesktop1.8.6-r0
alpine 3.14rdesktop1.8.6-r0
alpine 3.15rdesktop1.8.6-r0
alpine 3.16rdesktop1.8.6-r0
alpine 3.17rdesktop1.8.6-r0
alpine 3.18rdesktop1.8.6-r0
alpine 3.19rdesktop1.8.6-r0
alpine 3.20rdesktop1.8.6-r0
alpine 3.21rdesktop1.8.6-r0
alpine 3.22rdesktop1.8.6-r0
alpine 3.23rdesktop1.8.6-r0
alpine 3.24rdesktop1.8.6-r0
alpine edgerdesktop1.8.6-r0
debian 11rdesktop1.8.4-1
debian 12rdesktop1.8.4-1
debian 13rdesktop1.8.4-1
debian 14rdesktop1.8.4-1
debian 8rdesktop1.8.4-0+deb8u1
debian 9rdesktop1.8.4-1~deb9u1
echordesktop1.8.4-1
Red Hatrdesktopno fix listed
ubuntu 18.04-ESMrdesktopno fix listed

References

All 11 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.