Bug 2242231 (CVE-2023-42822)

Summary: CVE-2023-42822 xrdp: Unchecked access to font glyph info
Product: [Other] Security Response Reporter: TEJ RATHI <trathi>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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Fixed In Version: xrdp 0.9.23.1 Doc Type: If docs needed, set a value
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Bug Depends On: 2242232, 2242233    
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Description TEJ RATHI 2023-10-05 05:58:39 UTC 
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.

https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-2hjx-rm4f-r9hw
https://github.com/neutrinolabs/xrdp/commit/73acbe1f7957c65122b00de4d6f57a8d0d257c40
Comment 1 TEJ RATHI 2023-10-05 05:58:59 UTC 
Created xrdp tracking bugs for this issue:

Affects: epel-all [bug 2242233]
Affects: fedora-all [bug 2242232]