GHSA-fpf5-4jw8-67x8 json
rust-zserio has Unbounded Memory Allocation
published 6mo ago modified 6mo ago
- cvss
- 7.5
- version 3.1, GitHub
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- —
- no score, EPSS covers CVEs only
- public exploits
- 0
- none known
Summary
### Impact
When deserializing arrays, strings or bytes (blob) types zserio first reads the size of the variable, and then allocates sufficient memory to load data. Since the size is always trusted this can be abused by creating a data file with a large size value, causing the zserio runtime to allocate large amounts of memory.
### Patches
Please cherry-pick [57f5fb](https://github.com/Danaozhong/rust-zserio/commit/57f5fb4a2a8611d58dbcc1a9221349206dd99c3c).
### Workarounds
- Do not accept `zserio`-encoded messages from non-trusted sources. - Allocate a maximum heap amount to `rust-zerio` to avoid impacting other applications.
Patch / fix
Is GHSA-fpf5-4jw8-67x8 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | rust-zserio | <0.5.4 |
0.5.4 |
Classification
- Weakness
-
- CWE-789 Memory Allocation with Excessive Size Value
References
Sources
- GitHub Advisory GHSA-fpf5-4jw8-67x8
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