Information disclosure via truncated request-length calculation
Published Dec 14, 2022 · Updated Feb 13, 2025
Out-of-bounds reads in X.Org Server 21.1.4 and earlier allow local users to disclose process memory through crafted XIChangeProperty requests. ProcXIChangeProperty clips the calculated request length to 32 bits, allowing a large num_items value to pass validation before the server reads beyond the request and allocates at least 4 GB. Exploitation requires X client access; a privileged server enables local privilege escalation, while SSH X forwarding exposes remote code execution.
Summary
What happened
Out-of-bounds reads in X.Org Server 21.1.4 and earlier allow local users to disclose process memory through crafted XIChangeProperty requests. ProcXIChangeProperty clips the calculated request length to 32 bits, allowing a large num_items value to pass validation before the server reads beyond the request and allocates at least 4 GB. Exploitation requires X client access; a privileged server enables local privilege escalation, while SSH X forwarding exposes remote code execution.
The record
- CVE
- CVE-2022-46344
- Published
- Dec 14, 2022
- Updated
- Feb 13, 2025
- Vendor
- X.Org
- Product
- X.Org Server
- Classifications
- CWE-125, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 14, 2022CVE publishedPublication date reported by the CVE source.
- Feb 13, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=xorg-x11-server-1.20.4
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo