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CVE-2020-4044

Description

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.

Risk Information

Base Score
7.8
MODERATE
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
Exploitation Probability
0.802

Associated Vulnerability

VulnerabilityOS Platform
SUSE-SU-2020:1918-1(SUSE Linux Enterprise Server 12-SP5 ) xrdp-0.9.10-3.3.1.x86_64.rpmLinux
SUSE-SU-2020:1918-1(SUSE Linux Enterprise Server 12-SP5 ) xrdp-debuginfo-0.9.10-3.3.1.x86_64.rpmLinux
SUSE-SU-2020:1918-1(SUSE Linux Enterprise Server 12-SP5 ) xrdp-debugsource-0.9.10-3.3.1.x86_64.rpmLinux
xrdp security update(DSA-4737-1) xrdp_0.9.9-1+deb10u1_amd64.debLinux
xrdp security update(DSA-4737-1) xrdp_0.9.9-1+deb10u1_i386.debLinux
xrdp security update(DSA-4737-1) Debian_xrdp_0.9.9-1+deb10u1_amd64.debLinux
Remote Desktop Protocol (RDP) server (USN-6469-1) xrdp_0.9.12-1ubuntu0.1_amd64.debLinux
Remote Desktop Protocol (RDP) server (USN-6469-1) xrdp_0.6.0-1ubuntu0.1_i386.debLinux
Remote Desktop Protocol (RDP) server (USN-6469-1) xrdp_0.6.0-1ubuntu0.1_amd64.debLinux
Remote Desktop Protocol (RDP) server (USN-6469-1) xrdp_0.6.1-2ubuntu0.3_i386.debLinux
Remote Desktop Protocol (RDP) server (USN-6469-1) xrdp_0.6.1-2ubuntu0.3_amd64.debLinux
Remote Desktop Protocol (RDP) server (USN-6469-1) xrdp_0.9.5-2_i386.debLinux
Remote Desktop Protocol (RDP) server (USN-6469-1) xrdp_0.9.5-2_amd64.debLinux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234