CVE-2018-20177

Name: CVE-2018-20177
Creator: NVD / NIST
Published: 2019-03-15T18:29:00.423+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 7.93%

Last modified Jun 17, 2026

CVE-2018-20177 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 7.93% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

7.93%

94.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Rdesktop	Rdesktop	<= 1.8.3	—
Debian	Debian Linux	8.0	—
Debian	Debian Linux	9.0	—
Opensuse	Backports	sle-15	Sp1
Opensuse	Leap	15.1	—

References

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00040.htmlMailing List, Third Party Advisory
http://www.securityfocus.com/bid/106938Broken Link, Third Party Advisory, VDB Entry
https://github.com/rdesktop/rdesktop/commit/4dca546d04321a610c1835010b5dad85163b65e1Patch
https://lists.debian.org/debian-lts-announce/2019/02/msg00030.htmlMailing List, Third Party Advisory
https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/Exploit, Third Party Advisory
https://security.gentoo.org/glsa/201903-06Third Party Advisory
https://www.debian.org/security/2019/dsa-4394Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00040.htmlMailing List, Third Party Advisory
http://www.securityfocus.com/bid/106938Broken Link, Third Party Advisory, VDB Entry
https://github.com/rdesktop/rdesktop/commit/4dca546d04321a610c1835010b5dad85163b65e1Patch
https://lists.debian.org/debian-lts-announce/2019/02/msg00030.htmlMailing List, Third Party Advisory
https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/Exploit, Third Party Advisory
https://security.gentoo.org/glsa/201903-06Third Party Advisory
https://www.debian.org/security/2019/dsa-4394Third Party Advisory

Timeline

Published: Mar 15, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20177?

How severe is CVE-2018-20177?

CVE-2018-20177 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 7.93% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20177?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-20177?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST