Description
An out-of-bounds read vulnerability exists in the `DecodeLookupTable` function within `DicomImageDecoder.cpp`. The lookup-table decoding logic used for `PALETTE COLOR` images does not validate pixel indices against the lookup table size. Crafted images containing indices larger than the palette size cause the decoder to read beyond allocated lookup table memory and expose heap contents in the output image.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Orthanc | DICOM Server | ≤ 1.12.10 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | orthanc | 1.12.10+dfsg-4 | — |
| Debian 13 | orthanc | No fix yet | — |
| Debian 12 | orthanc | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | orthanc | No fix yet | — |
| Ubuntu 26.04 LTS | orthanc | No fix yet | — |
| Ubuntu 25.10 | orthanc | No fix yet | — |
| Ubuntu 24.04 LTS | orthanc | No fix yet | — |
| Ubuntu 22.04 LTS | orthanc | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | orthanc | No fix yet | — |
| Ubuntu 18.04 LTS | orthanc | No fix yet | — |
| Ubuntu 16.04 LTS | orthanc | No fix yet | — |