Description
A security vulnerability has been detected in WebAssembly wabt up to 1.0.39. This issue affects the function wabt::Decompiler::VarName of the file /src/repro/wabt/bin/wasm-decompile of the component wasm-decompile. Such manipulation leads to out-of-bounds read. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used. Unfortunately, the project has no active maintainer at the moment. In a reply to the issue report somebody recommended to the researcher to provide a PR himself.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| WebAssembly | wabt | 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.0.9, 1.0.10, 1.0.11, 1.0.12, 1.0.13, 1.0.14, 1.0.15, 1.0.16, 1.0.17, 1.0.18, 1.0.19, 1.0.20, 1.0.21, 1.0.22, 1.0.23, 1.0.24, 1.0.25, 1.0.26, 1.0.27, 1.0.28, 1.0.29, 1.0.30, 1.0.31, 1.0.32, 1.0.33, 1.0.34, 1.0.35, 1.0.36, 1.0.37, 1.0.3… | — |
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 | wabt | No fix yet | — |
| Debian 13 | wabt | No fix yet | — |
| Debian 12 | wabt | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | wabt | No fix yet | — |
| Ubuntu 26.04 LTS | wabt | No fix yet | — |
| Ubuntu 25.10 | wabt | No fix yet | — |
| Ubuntu 24.04 LTS | wabt | No fix yet | — |
| Ubuntu 22.04 LTS | wabt | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | wabt | No fix yet | — |
References
- VDB-339333 | WebAssembly wabt wasm-decompile VarName out-of-bounds vdb-entry technical-description
- VDB-339333 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #719826 | WebAssembly wabt 1.0.39 and master-branch Memory Corruption third-party-advisory
- https://github.com/WebAssembly/wabt/issues/2678 issue-tracking
- https://github.com/oneafter/1208/blob/main/af1 exploit
- https://github.com/WebAssembly/wabt/ product