Description
WildMIDI through 0.5.0 contains a heap out-of-bounds read vulnerability in the HMP parser _WM_ParseNewHmp() that allows attackers to read beyond buffers via underflowed chunk lengths. Attackers can supply a crafted .hmp file with a chunk length of 0-12 that wraps to roughly 4 GB, crashing applications or exposing heap bytes through WildMidi_GetInfo().
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mindwerks | WildMIDI | ≤ 0.5.0 | — |
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 | wildmidi | No fix yet | — |
| Debian 13 | wildmidi | No fix yet | — |
| Debian 12 | wildmidi | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | wildmidi | No fix yet | — |
| Ubuntu 26.04 LTS | wildmidi | No fix yet | — |
| Ubuntu 24.04 LTS | wildmidi | No fix yet | — |
| Ubuntu 22.04 LTS | wildmidi | No fix yet | — |
| Ubuntu 20.04 LTS | wildmidi | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | wildmidi | No fix yet | — |
| Ubuntu 14.04 LTS | wildmidi | No fix yet | — |
| Ubuntu Pro 16.04 LTS | wildmidi | No fix yet | — |
References
- https://hackmd.io/@haind-pwn/wildmidi-hmp-chunk-length-underflow-oob-read technical-description
- https://github.com/Mindwerks/wildmidi/blob/340472ed4633d139d30c660b90eca03c1320e593/src/f_hmp.c#L258-L261 technical-description
- https://github.com/Mindwerks/wildmidi/blob/340472ed4633d139d30c660b90eca03c1320e593/src/internal_midi.c#L2166-L2172 technical-description
- https://github.com/Mindwerks/wildmidi product
- VulnCheck Advisory: WildMIDI through 0.5.0 Heap Out-of-Bounds Read via _WM_ParseNewHmp third-party-advisory