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CVE-2018-20179

33
FAUCET Score

CVE-2018-20179 is a critical integer underflow vulnerability in rdesktop versions up to and including v1.8.3, leading to a heap-based buffer overflow in the lspci_process() function. This flaw can result in memory corruption and potentially remote code execution. With a CVSS score of 9.8 (CRITICAL), it presents a severe risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.8.3CPE matchmatch criteria
cpe:2.3:a:rdesktop:rdesktop:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.79%
Probability of exploitation in next 30 days
EPSS Percentile
93.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0679 is in the 88th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: rdesktop
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: rdesktop

Vendor Advisories (1)

redhatCVE-2018-20179Moderate

rdesktop: Remote code execution in lspci_process

Jan 4, 2019

References

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