Code execution in neutrinolabs xrdp

1) Stack-based buffer overflow

EUVDB-ID: #VU31719

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-4044

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error. A local user can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

xrdp: 0.6.0 - 0.9.13

CPE2.3

• cpe:2.3:a:neutrinolabs:xrdp:0.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:neutrinolabs:xrdp:0.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:neutrinolabs:xrdp:0.6.2:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2020-07/msg00036.html
https://github.com/neutrinolabs/xrdp/commit/0c791d073d0eb344ee7aaafd221513dc9226762c
https://github.com/neutrinolabs/xrdp/releases/tag/v0.9.13.1
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-j9fv-6fwf-p3g4

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.