Xrdp
CVE-2020-4044
HIGH
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionNVD
The xrdp-sesman service before version 0.9.13.1 can be crashed by connecting over port 3350 and supplying a malicious payload. Once the xrdp-sesman process is dead, an unprivileged attacker on the server could then proceed to start their own imposter sesman service listening on port 3350. This will allow them to capture any user credentials that are submitted to XRDP and approve or reject arbitrary login credentials. For xorgxrdp sessions in particular, this allows an unauthorized user to hijack an existing session. This is a buffer overflow attack, so there may be a risk of arbitrary code execution as well.
AnalysisAI
The xrdp-sesman service before version 0.9.13.1 can be crashed by connecting over port 3350 and supplying a malicious payload. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
Technical ContextAI
This vulnerability is classified under CWE-121. The xrdp-sesman service before version 0.9.13.1 can be crashed by connecting over port 3350 and supplying a malicious payload. Once the xrdp-sesman process is dead, an unprivileged attacker on the server could then proceed to start their own imposter sesman service listening on port 3350. This will allow them to capture any user credentials that are submitted to XRDP and approve or reject arbitrary login credentials. For xorgxrdp sessions in particular, this allows an unauthorized user to hijack an existing session. This is a buffer overflow attack, so there may be a risk of arbitrary code execution as well. Affected products include: Neutrinolabs Xrdp. Version information: version 0.9.13.1.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
An issue was discovered in xrdp before 0.9.1. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploit
xrdp is an open source RDP server. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no au
xrdp is an open source project which provides a graphical login to remote machines using Microsoft Remote Desktop Protoc
xrdp is an open source project which provides a graphical login to remote machines using Microsoft Remote Desktop Protoc
xrdp is an open source project which provides a graphical login to remote machines using Microsoft Remote Desktop Protoc
xrdp is an open source project which provides a graphical login to remote machines using Microsoft Remote Desktop Protoc
xrdp is an open source project which provides a graphical login to remote machines using Microsoft Remote Desktop Protoc
xrdp is an open source project which provides a graphical login to remote machines using Microsoft Remote Desktop Protoc
xrdp open-source RDP server before v0.10.5 has an unauthenticated stack buffer overflow enabling remote code execution.
xrdp is an open source project which provides a graphical login to remote machines using Microsoft Remote Desktop Protoc
xrdp is an open source project which provides a graphical login to remote machines using Microsoft Remote Desktop Protoc
xrdp is an open source project which provides a graphical login to remote machines using Microsoft Remote Desktop Protoc
Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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