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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| neutrinolabs | xrdp | < 0.9.13.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | xrdp | 0.9.12-1.1 | — |
| Debian 13 | xrdp | 0.9.12-1.1 | — |
| Debian 12 | xrdp | 0.9.12-1.1 | — |
| Debian 10 | xrdp | 0.9.9-1+deb10u1 | DSA-4737-1 |
| Debian 9 | xrdp | 0.9.1-9+deb9u4 | DLA-2319-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | xrdp | 0.9.12-1ubuntu0.1 | USN-6469-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | xrdp | 0.9.5-2ubuntu0.1~esm1 | USN-6469-1 |
| Ubuntu Pro 16.04 LTS | xrdp | 0.6.1-2ubuntu0.3+esm2 | USN-6469-1 |
| Ubuntu Pro 14.04 LTS | xrdp | 0.6.0-1ubuntu0.1+esm2 | USN-6469-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | xrdp | 0.9.13.1-4.3.1 | SUSE-SU-2020:2142-1 |
| SLES 15 SP1 | xrdp | 0.9.6-4.8.1 | SUSE-SU-2020:1933-1 |
| SLES 15 | xrdp | 0.9.6-4.8.1 | SUSE-SU-2020:1933-1 |
| SLES 12 SP5 | xrdp | 0.9.10-3.3.1 | SUSE-SU-2020:1918-1 |
| SLES 12 SP4 | xrdp | 0.9.0~git.1456906198.f422461-21.27.1 | SUSE-SU-2020:1991-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | xrdp | 0.9.0~git.1456906198.f422461-21.27.1 | SUSE-SU-2020:1991-1 |
| SLES 12 SP2 | xrdp | 0.9.0~git.1456906198.f422461-16.20.1 | SUSE-SU-2020:1943-1 |
| SLES for SAP 15 | xrdp | 0.9.6-4.8.1 | SUSE-SU-2020:1933-1 |
| SLES for SAP 12 SP5 | xrdp | 0.9.10-3.3.1 | SUSE-SU-2020:1918-1 |
| SLES for SAP 12 SP4 | xrdp | 0.9.0~git.1456906198.f422461-21.27.1 | SUSE-SU-2020:1991-1 |
| SLES for SAP 12 SP3 | xrdp | 0.9.0~git.1456906198.f422461-21.27.1 | SUSE-SU-2020:1991-1 |
| SLES for SAP 12 SP2 | xrdp | 0.9.0~git.1456906198.f422461-16.20.1 | SUSE-SU-2020:1943-1 |
| SLE HPC 15 | xrdp | 0.9.6-4.8.1 | SUSE-SU-2020:1933-1 |
| SUSE OpenStack Cloud Crowbar 9 | xrdp | 0.9.0~git.1456906198.f422461-21.27.1 | SUSE-SU-2020:1991-1 |
| SUSE OpenStack Cloud Crowbar 8 | xrdp | 0.9.0~git.1456906198.f422461-21.27.1 | SUSE-SU-2020:1991-1 |
| SUSE OpenStack Cloud 9 | xrdp | 0.9.0~git.1456906198.f422461-21.27.1 | SUSE-SU-2020:1991-1 |
| SUSE OpenStack Cloud 8 | xrdp | 0.9.0~git.1456906198.f422461-21.27.1 | SUSE-SU-2020:1991-1 |
| SUSE OpenStack Cloud 7 | xrdp | 0.9.0~git.1456906198.f422461-16.20.1 | SUSE-SU-2020:1943-1 |
| SUSE HPE Helion OpenStack 8 | xrdp | 0.9.0~git.1456906198.f422461-21.27.1 | SUSE-SU-2020:1991-1 |
| SUSE Enterprise Storage 5 | xrdp | 0.9.0~git.1456906198.f422461-21.27.1 | SUSE-SU-2020:1991-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xrdp | 0.9.15-2.2 | openSUSE-SU-2024:11526-1 |
| openSUSE Leap 15.2 | xrdp | 0.9.13.1-lp152.3.3.1 | openSUSE-SU-2020:1200-1 |
| openSUSE Leap 15.1 | xrdp | 0.9.6-lp151.4.6.1 | openSUSE-SU-2020:0999-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xrdp | 0.9.13.1-r0 | — |
| Alpine v3.23 | xrdp | 0.9.13.1-r0 | — |
| Alpine v3.22 | xrdp | 0.9.13.1-r0 | — |
| Alpine v3.21 | xrdp | 0.9.13.1-r0 | — |
| Alpine v3.20 | xrdp | 0.9.13.1-r0 | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xrdp | 0.9.13.1-r0 | — |
| Alpine v3.18 | xrdp | 0.9.13.1-r0 | — |
| Alpine v3.17 | xrdp | 0.9.13.1-r0 | — |
| Alpine v3.16 | xrdp | 0.9.13.1-r0 | — |
| Alpine v3.15 | xrdp | 0.9.13.1-r0 | — |
| Alpine v3.14 | xrdp | 0.9.13.1-r0 | — |
| Alpine v3.13 | xrdp | 0.9.13.1-r0 | — |
| Alpine v3.12 | xrdp | 0.9.13.1-r0 | — |
Advisories 11
- USN-6469-1 xrdp vulnerability Ubuntu Security Notices (USN) · Jun 29, 2026
- DSA-4737-1 xrdp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2319-1 xrdp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:1991-1 Security update for xrdp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1918-1 Security update for xrdp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1933-1 Security update for xrdp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1943-1 Security update for xrdp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11526-1 libpainter0-0.9.15-2.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1200-1 Security update for xrdp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0999-1 Security update for xrdp SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2020:2142-1 Security update for xrdp SUSE / openSUSE Security Updates · May 2, 2025
References
- https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-j9fv-6fwf-p3g4
- https://github.com/neutrinolabs/xrdp/releases/tag/v0.9.13.1
- https://github.com/neutrinolabs/xrdp/commit/0c791d073d0eb344ee7aaafd221513dc9226762c
- openSUSE-SU-2020:0999 vendor-advisory
- DSA-4737 vendor-advisory
- [debian-lts-announce] 20200809 [SECURITY] [DLA 2319-1] xrdp security update mailing-list
- openSUSE-SU-2020:1200 vendor-advisory