Orthanc DICOM Server
GZIP Decompression Bomb via Content-Encoding Header
The GZIP decompression logic allocates output buffers based on the ISIZE trailer field from the GZIP stream without validating its size.
This advisory contains limited information during coordinated disclosure. Please check back later for full details.
Description
A crafted small GZIP payload that claims a large decompressed size results in excessive memory allocation and denial of service.
Impact
- Denial of service.
Mitigation
Update Orthanc to version 1.12.11 or later.
References
How We Can Help
Who We Are
The security researchers behind this advisory.
Dr. rer. nat. Simon Weber
Senior Pentester & MedSec Researcher
I evaluate your SaMD with the same industry-defining security insight I contributed to the BAK MV for the revision of the B3S standard.
- PhD on Hospital Cybersecurity
- Critical vulnerabilities found in hospital systems
- Alumni of THB MedSec Research Group
- gematik Security Hero
Dipl.-Inf. Volker Schönefeld
Senior Application Security Expert
As a former CTO and developer turned pentester, I work alongside your team to uncover vulnerabilities and find solutions that fit your architecture.
- 20+ years as CTO, 50M+ app downloads
- Architected and secured large-scale IoT fleets
- Certified Web Exploitation Specialist
- gematik Security Hero
Looking for a Penetration Test?
Machine Spirits specializes in security assessments for medical devices and healthcare IT. From MDR penetration testing to C5 cloud compliance, we help MedTech companies meet regulatory requirements.