Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2020-4044— Local users can perform a buffer overflow attack against the xrdp-sesman service and then impersonate it

Quick assessment

Affected
neutrinolabs xrdp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

xrdp-sesman service是一款开源的RDP（远程桌面协议）服务器。 xrdp-sesman service 0.9.13.1之前版本中存在缓冲区错误漏洞。远程攻击者可通过连接3350端口并提供恶意的payload利用该漏洞在系统上执行任意代码或导致应用程序崩溃（拒绝服务）。

CVSS 7.5 · High EPSS 2.40% · P83
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2020-4044

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Local users can perform a buffer overflow attack against the xrdp-sesman service and then impersonate it
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
xrdp-sesman service 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
xrdp-sesman service是一款开源的RDP（远程桌面协议）服务器。 xrdp-sesman service 0.9.13.1之前版本中存在缓冲区错误漏洞。远程攻击者可通过连接3350端口并提供恶意的payload利用该漏洞在系统上执行任意代码或导致应用程序崩溃（拒绝服务）。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
neutrinolabs xrdp < 0.9.13.1 -

II. Public POCs for CVE-2020-4044

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2020-4044

请登录查看更多情报信息。

Patches & Fixes for CVE-2020-4044 (1)

Vendor Advisories for CVE-2020-4044 (2)

Mailing List Discussions for CVE-2020-4044 (3)

Other References for CVE-2020-4044 (1)

IV. Related Vulnerabilities

Same product: xrdp
Same vendor: neutrinolabs
Same weakness: CWE-121

V. Comments for CVE-2020-4044

No comments yet

Leave a comment