CVE-2006-2940
UnknownEPSS 4.90%
Last modified
CVE-2006-2940 is a vulnerability of currently unknown severity. OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via parasitic public keys with large (1) "public exponent" or (2) "public modulus" values in X.509 certificates that require extra time to process when using RSA signature verification.. EPSS estimates a 4.90% chance of exploitation in the next 30 days.
Description
OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via parasitic public keys with large (1) "public exponent" or (2) "public modulus" values in X.509 certificates that require extra time to process when using RSA signature verification.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openssl | Openssl | 0.9.1c |
| Openssl | Openssl | 0.9.2b |
| Openssl | Openssl | 0.9.3 |
| Openssl | Openssl | 0.9.3a |
| Openssl | Openssl | 0.9.4 |
| Openssl | Openssl | 0.9.5 |
| Openssl | Openssl | 0.9.5a |
| Openssl | Openssl | 0.9.6 |
| Openssl | Openssl | 0.9.6a |
| Openssl | Openssl | 0.9.6b |
| Openssl | Openssl | 0.9.6c |
| Openssl | Openssl | 0.9.6d |
| Openssl | Openssl | 0.9.6e |
| Openssl | Openssl | 0.9.6f |
| Openssl | Openssl | 0.9.6g |
| Openssl | Openssl | 0.9.6h |
| Openssl | Openssl | 0.9.6i |
| Openssl | Openssl | 0.9.6j |
| Openssl | Openssl | 0.9.6k |
| Openssl | Openssl | 0.9.6l |
| Openssl | Openssl | 0.9.6m |
| Openssl | Openssl | 0.9.7 |
| Openssl | Openssl | 0.9.7a |
| Openssl | Openssl | 0.9.7b |
| Openssl | Openssl | 0.9.7c |
| Openssl | Openssl | 0.9.7d |
| Openssl | Openssl | 0.9.7e |
| Openssl | Openssl | 0.9.7f |
| Openssl | Openssl | 0.9.7g |
| Openssl | Openssl | 0.9.7h |
| Openssl | Openssl | 0.9.7i |
| Openssl | Openssl | 0.9.7j |
| Openssl | Openssl | 0.9.7k |
| Openssl | Openssl | 0.9.8 |
| Openssl | Openssl | 0.9.8a |
| Openssl | Openssl | 0.9.8b |
| Openssl | Openssl | 0.9.8c |
References
- http://secunia.com/advisories/22094Vendor Advisory
- http://secunia.com/advisories/22116Vendor Advisory
- http://secunia.com/advisories/22130Vendor Advisory
- http://secunia.com/advisories/22165Vendor Advisory
- http://secunia.com/advisories/22166Vendor Advisory
- http://secunia.com/advisories/22172Vendor Advisory
- http://secunia.com/advisories/22186Vendor Advisory
- http://secunia.com/advisories/22193Vendor Advisory
- http://secunia.com/advisories/22207Vendor Advisory
- http://secunia.com/advisories/22212Vendor Advisory
- http://secunia.com/advisories/22216Vendor Advisory
- http://secunia.com/advisories/22220Vendor Advisory
- http://secunia.com/advisories/22240Vendor Advisory
- http://secunia.com/advisories/22259Vendor Advisory
- http://secunia.com/advisories/22260Vendor Advisory
- http://secunia.com/advisories/22284Vendor Advisory
- http://secunia.com/advisories/22330Vendor Advisory
- http://secunia.com/advisories/22385Vendor Advisory
- http://secunia.com/advisories/22460Vendor Advisory
- http://secunia.com/advisories/22500Vendor Advisory
- http://secunia.com/advisories/22544Vendor Advisory
- http://www.redhat.com/support/errata/RHSA-2006-0695.htmlVendor Advisory
- http://www.us-cert.gov/cas/techalerts/TA06-333A.htmlUS Government Resource
- http://secunia.com/advisories/22094Vendor Advisory
- http://secunia.com/advisories/22116Vendor Advisory
- http://secunia.com/advisories/22130Vendor Advisory
- http://secunia.com/advisories/22165Vendor Advisory
- http://secunia.com/advisories/22166Vendor Advisory
- http://secunia.com/advisories/22172Vendor Advisory
- http://secunia.com/advisories/22186Vendor Advisory
- http://secunia.com/advisories/22193Vendor Advisory
- http://secunia.com/advisories/22207Vendor Advisory
- http://secunia.com/advisories/22212Vendor Advisory
- http://secunia.com/advisories/22216Vendor Advisory
- http://secunia.com/advisories/22220Vendor Advisory
- http://secunia.com/advisories/22240Vendor Advisory
- http://secunia.com/advisories/22259Vendor Advisory
- http://secunia.com/advisories/22260Vendor Advisory
- http://secunia.com/advisories/22284Vendor Advisory
- http://secunia.com/advisories/22330Vendor Advisory
- http://secunia.com/advisories/22385Vendor Advisory
- http://secunia.com/advisories/22460Vendor Advisory
- http://secunia.com/advisories/22500Vendor Advisory
- http://secunia.com/advisories/22544Vendor Advisory
- http://www.redhat.com/support/errata/RHSA-2006-0695.htmlVendor Advisory
- http://www.us-cert.gov/cas/techalerts/TA06-333A.htmlUS Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2006-2940?
OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via parasitic public keys with large (1) "public exponent" or (2) "public modulus" values in X.509 certificates that require extra time to process when using RSA signature verification.
How severe is CVE-2006-2940?
Severity scoring for CVE-2006-2940 is pending analysis. The EPSS model estimates a 4.90% probability of exploitation in the next 30 days.
How do I fix CVE-2006-2940?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2006
- CVE-2006-2934SCTP conntrack (ip_conntrack_proto_sctp.c) in netfilter for …
- CVE-2006-2935The dvd_read_bca function in the DVD handling code in driver…
- CVE-2006-2936The ftdi_sio driver (usb/serial/ftdi_sio.c) in Linux kernel …
- CVE-2006-2937OpenSSL 0.9.7 before 0.9.7l and 0.9.8 before 0.9.8d allows r…
- CVE-2006-2938Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultI…
- CVE-2006-2939Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultI…
- CVE-2006-2941Mailman before 2.1.9rc1 allows remote attackers to cause a d…
- CVE-2006-2942TWiki 4.0.0, 4.0.1, and 4.0.2 allows remote attackers to gai…
- CVE-2006-2943Unspecified vulnerability in CGI-RESCUE WebFORM 4.1 and earl…
- CVE-2006-2944Unspecified vulnerability in CGI-RESCUE FORM2MAIL 1.21 and e…
- CVE-2006-2945Unspecified vulnerability in the user profile change functio…
- CVE-2006-2946Dmx Forum 2.1a stores _includes/bd.inc under the web root wi…
Are you affected by CVE-2006-2940?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST