Application crash via DICOM length integer overflow
Published May 22, 2024 · Updated Feb 13, 2025
Heap buffer overflow in XMedCon before 0.24.0 allows local users to crash the application by processing a crafted DICOM file. In dicom_load() in libs/dicom/basic.c, an attacker-controlled UN element length wraps during the element.length + 4 allocation, after which fread writes the full declared length into the undersized heap buffer. The attacker must supply a malicious DICOM file for local processing; the published CVSS assessment bounds the demonstrated impact to application availability.
Summary
What happened
Heap buffer overflow in XMedCon before 0.24.0 allows local users to crash the application by processing a crafted DICOM file. In dicom_load() in libs/dicom/basic.c, an attacker-controlled UN element length wraps during the element.length + 4 allocation, after which fread writes the full declared length into the undersized heap buffer. The attacker must supply a malicious DICOM file for local processing; the published CVSS assessment bounds the demonstrated impact to application availability.
The record
- CVE
- CVE-2024-29421
- Published
- May 22, 2024
- Updated
- Feb 13, 2025
- Vendor
- (X)MedCon Project
- Product
- XMedCon
- Classifications
- CWE-121, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 22, 2024CVE 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
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=0.23.0
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.
Weakness, pattern, technique
Public exploit references
- heap-overflow-write1.tc proof of conceptproof of concept · demonstrated
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
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