Unchecked access to font glyph info in xrdp
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.
Summary
xrdp is an open source remote desktop protocol server. Access to the font glyphs in xrdp_painter.c is not bounds-checked . Since some of this data is controllable by the user, this can result in an out-of-bounds read within the xrdp executable. The vulnerability allows an out-of-bounds read within a potentially privileged process. On non-Debian platforms, xrdp tends to run as root. Potentially an out-of-bounds write can follow the out-of-bounds read. There is no denial-of-service impact, providing xrdp is running in forking mode. This issue has been addressed in release 0.9.23.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| neutrinolabs | xrdp | before 0.9.23.1 | 0.9.23.1 | Patch available | CNA |
- xrdp Vendorneutrinolabs Affected before 0.9.23.1 Fixed in 0.9.23.1 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:* | before 0.9.23.1 | Vulnerable | neutrinolabs |
| cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* | 37 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* | 38 | Vulnerable | Fedoraproject |
- cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:* Versions before 0.9.23.1 Vulnerable ·neutrinolabs
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject
Remediation
- Fix · CNA xrdp (neutrinolabs) Fixed in 0.9.23.1
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2023-42822
References
Other 3
- https://lists.fedoraproject.org/archives/list/[email protected]/message/PFGL22QQF65OIZRMCKUZCVJQCKGUBRYE/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/RTXODUR4ILM7ZPA6ZGY6VSK4BBSBMKGY/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/5FPGA4M7IYCP7OILDF2ZJEVSXUOFEFQ6/
More neutrinolabs Xrdp vulnerabilities
- TI-2025-42163 xrdp improperly checks bounds of domain string length, which leads to Stack-based Buffer Overflow CVSS 3.1CRITICAL 9.8
- TI-2026-29860 xrdp: lib_palette_update Heap Buffer Overflow & RCE CVSS 3.1CRITICAL 9.8
- TI-2022-07540 Buffer Overflow in xrdp CVSS 3.1CRITICAL 9.8
- TI-2022-07539 Buffer Overflow occurs in xrdp CVSS 3.1CRITICAL 9.8
- TI-2022-07538 Out of Bound Write in xrdp CVSS 3.1CRITICAL 9.8
- TI-2022-07537 Buffer Overflow in xrdp CVSS 3.1CRITICAL 9.8
Sources
- CVE-2023-42822 · CVE Program
- CVE-2023-42822 · NVD
- FIRST EPSS
- CVE-2023-42822 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences