CVE Vulnerability

CVE-2020-4044

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.

4.6 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

7.8 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/neutrinolabs/xrdp/releases/tag/v0.9.13.1 Release Notes Third Party Advisory
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-j9fv-6fwf-p3g4 Third Party Advisory
https://github.com/neutrinolabs/xrdp/commit/0c791d073d0eb344ee7aaafd221513dc9226762c Patch Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00036.html
https://www.debian.org/security/2020/dsa-4737
https://lists.debian.org/debian-lts-announce/2020/08/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00037.html
Configurations

Configuration 1

cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:*
Information

Published : 2020-06-30 04:15

Updated : 2020-08-14 09:15

NVD link : CVE-2020-4044

Mitre link : CVE-2020-4044

Products Affected
No products.
CWE
CWE-121