Out-of-bounds Read in Neutrinolabs Xrdp
CVE-2023-42822
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.
Vulnerability class: Buffer Overflow
EPSS: 0.006 (46.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.
Affected products
- Neutrinolabs Xrdp — versions < 0.9.23.1
- Fedoraproject Fedora — versions 37, 38
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Mailing List, Release Notes)
- security-advisories@github.com (Mailing List, Release Notes)
- security-advisories@github.com (Release Notes)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-42822?
- CVE-2023-42822 is a medium-severity vulnerability in Neutrinolabs Xrdp, classified under Out-of-bounds Read. CVSS score: 4.6/10. Published 2023-09-27.
- How severe is CVE-2023-42822?
- Medium severity. CVSS v3 base score is 4.6 out of 10.
- Is CVE-2023-42822 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.