Wasmtime WASI implementations are vulnerable to guest-controlled resource exhaustion
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 24.0.6, 36.0.6, 40.0.4, 41.0.4
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
Wasmtime is a runtime for WebAssembly. Prior to versions 24.0.6, 36.0.6, 4.0.04, 41.0.4, and 42.0.0, Wasmtime's implementation of WASI host interfaces are susceptible to guest-controlled resource exhaustion on the host. Wasmtime did not appropriately place limits on resource allocations requested by the guests. This serves as a Denial of Service vector. Wasmtime 24.0.6, 36.0.6, 40.0.4, 41.0.4, and 42.0.0 have all been released with the fix for this issue. These versions do not prevent this issue in their default configuration to avoid breaking preexisting behaviors. All versions of Wasmtime have appropriate knobs to prevent this behavior, and Wasmtime 42.0.0-and-later will have these knobs tuned by default to prevent this issue from happening. There are no known workarounds for this issue without upgrading. Embedders are recommended to upgrade and configure their embeddings as necessary to prevent possibly-malicious guests from triggering this issue.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- bytecodealliance wasmtime
fixed in 24.0.6; From 25.0.0 · fixed in 36.0.6; From 37.0.0 · fixed in 40.0.4; From 41.0.0 · fixed in 41.0.4
- wasmtimecrates.io
fixed in 24.0.6
- wasmtimecrates.io
From 25.0.0 · fixed in 36.0.6
- wasmtimecrates.io
From 37.0.0 · fixed in 40.0.4
- wasmtimecrates.io
From 0.0.0-0 · fixed in 24.0.6; From 25.0.0 · fixed in 36.0.6; From 37.0.0 · fixed in 40.0.4; From 41.0.0 · fixed in 41.0.4