Dual_EC_DRBG: weak pseudo random number generator
Published Oct 11, 2013
5.8
MEDIUMCVSS 2.0
EPSS 1.63%
Description
The NIST SP 800-90A default statement of the Dual Elliptic Curve Deterministic Random Bit Generation (Dual_EC_DRBG) algorithm contains point Q constants with a possible relationship to certain "skeleton key" values, which might allow context-dependent attackers to defeat cryptographic protection mechanisms by leveraging knowledge of those values. NOTE: this is a preliminary CVE for Dual_EC_DRBG; future research may provide additional details about point Q and associated attacks, and could potentially lead to a RECAST or REJECT of this CVE.
Affected products
No data.
- ≥ 3.0.0.0 · ≤ 3.0.0.20
- 5.0
- 5.0.1
No data.
Red Hat Enterprise Linux 5
gnutls
Not affected
Red Hat Enterprise Linux 5
nss
Not affected
Red Hat Enterprise Linux 5
openssl
Not affected
Red Hat Enterprise Linux 6
gnutls
Not affected
Red Hat Enterprise Linux 6
nss
Not affected
Red Hat Enterprise Linux 6
openssl
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | gnutls | Not affected | n/a |
| Red Hat Enterprise Linux 5 | nss | Not affected | n/a |
| Red Hat Enterprise Linux 5 | openssl | Not affected | n/a |
| Red Hat Enterprise Linux 6 | gnutls | Not affected | n/a |
| Red Hat Enterprise Linux 6 | nss | Not affected | n/a |
| Red Hat Enterprise Linux 6 | openssl | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect cryptography library packages as shipped with Red Hat products, as they do not implement Dual EC DRBG algorithm.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:P/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.63% (0.01632) | 75.41th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.63% (0.01632) | 73.06th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.46% (0.00455) | 61.78th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.61% (0.00614) | 79.42th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.61% (0.00614) | 78.06th | v3 (v2023.03.01) |
| May 24, 2023 | 0.61% (0.00614) | 75.66th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.63% (0.00626) | 75.69th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.18% (0.01183) | 61.76th | v2 (v2022.01.01) |
| Oct 19, 2022 | 1.18% (0.01183) | 60.79th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.18% (0.01183) | 58.77th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.18% (0.01183) | 35.15th | v2 (v2022.01.01) |
References (12)
- http://arstechnica.com/security/2013/09/stop-using-nsa-influence-code-in-our-product-rsa-tells-customers/ x_refsource_MISCThird Party Advisory
- http://blog.cryptographyengineering.com/2013/09/rsa-warns-developers-against-its-own.html x_refsource_MISCThird Party Advisory
- http://blog.cryptographyengineering.com/2013/09/the-many-flaws-of-dualecdrbg.html x_refsource_MISCThird Party Advisory
- http://rump2007.cr.yp.to/15-shumow.pdf x_refsource_MISCThird Party Advisory
- http://stream.wsj.com/story/latest-headlines/SS-2-63399/SS-2-332655/ x_refsource_MISCNot Applicable
- http://threatpost.com/in-wake-of-latest-crypto-revelations-everything-is-suspect x_refsource_MISCThird Party Advisory
- http://www.securityfocus.com/bid/63657 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2007-6755 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1046045 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2007-6755
- https://www.cve.org/CVERecord?id=CVE-2007-6755
- https://www.schneier.com/blog/archives/2007/11/the_strange_sto.html x_refsource_MISCThird Party Advisory
Change history (0)
No recorded changes yet.