CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
EPSS
Percentile
99.3%
Some implementations of SSL/TLS accept export-grade (512-bit or smaller) RSA keys even when not specifically requesting export grade ciphers. An attacker able to act as a Man-in-The-Middle (MiTM) could factor weak temporary RSA keys, obtain session keys, and decrypt SSL/TLS trafflc. This issue has been dubbed the “FREAK” (Factoring Attack on RSA-EXPORT Keys) attack.
CWE-757: Selection of Less-Secure Algorithm During Negotiation (‘Algorithm Downgrade’)
CWE-326: Inadequate Encryption Strength
Some implementations of SSL/TLS accept export-grade (512-bit or smaller) RSA keys even when not specifically requesting export grade ciphers. This can occur when a MiTM attacker asks for export grade ciphers on behalf of a client, and the client insecurely accepts the export grade key. The attacker can then factor the weak RSA key and use this key to decrypt other data necessary to generate the session key. The attacker can then decrypt data in the session.
The researchers provide a more detailed explanation on their website.
The weak 512-bit “export grade” RSA keys can be factored to allow an attacker to decrypt information encrypted with these keys.
Update SSL/TLS libraries and applications
Vendors are currently working on patches to address this issue. Affected users are advised to check with the software vendor and update as soon as possible. The Vendor Status information below provides more information for each vendor.
Do not offer export grade ciphers
Configure server and client applications not to use export grade ciphers (EC).
243585
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Notified: March 06, 2015 Updated: March 06, 2015
Affected
We have not received a statement from the vendor.
SecureTransport is affected.
Safari web browser is affected.
Notified: March 06, 2015 Updated: March 06, 2015
Affected
We have not received a statement from the vendor.
BoringSSL versions before Nov 10, 2014 are vulnerable.
Google Chrome web browser prior to version 41 on various platforms are vulnerable.
Android Web Browser is vulnerable.
Notified: March 06, 2015 Updated: March 10, 2015
Affected
We have not received a statement from the vendor.
SChannel is vulnerable. Internet Explorer is also vulnerable.
A patch has been released. Please see the Microsoft Security Bulletin below.
Updated: October 26, 2015
Affected
We provide information on this issue at the following URL <<http://jpn.nec.com/security-info/secinfo/nv15-016.html>>(only in Japanese)
We are not aware of further vendor information regarding this vulnerability.
Notified: March 06, 2015 Updated: March 06, 2015
Affected
We have not received a statement from the vendor.
OpenSSL versions before 1.0.1k are vulnerable. The vulnerability in OpenSSL is tracked as CVE-2015-0204.
Updated: March 06, 2015
Affected
We have not received a statement from the vendor.
Opera web browsers before Opera 28 on OSX and Android are vulnerable.
Updated: March 06, 2015
Affected
We have not received a statement from the vendor.
Blackberry Browser web browser is vulnerable.
Notified: March 06, 2015 Updated: March 06, 2015
Statement Date: March 06, 2015
Not Affected
We have not received a statement from the vendor.
We are not aware of further vendor information regarding this vulnerability.
Notified: March 06, 2015 Updated: March 09, 2015
Statement Date: March 08, 2015
Not Affected
We have not received a statement from the vendor.
We are not aware of further vendor information regarding this vulnerability.
Notified: March 06, 2015 Updated: March 06, 2015
Statement Date: March 06, 2015
Not Affected
We have not received a statement from the vendor.
We are not aware of further vendor information regarding this vulnerability.
Notified: March 06, 2015 Updated: March 17, 2015
Statement Date: March 17, 2015
Not Affected
We have not received a statement from the vendor.
We are not aware of further vendor information regarding this vulnerability.
Notified: March 06, 2015 Updated: March 09, 2015
Statement Date: March 09, 2015
Not Affected
We have not received a statement from the vendor.
We are not aware of further vendor information regarding this vulnerability.
Notified: March 06, 2015 Updated: March 05, 2015
Unknown
We have not received a statement from the vendor.
Notified: March 06, 2015 Updated: March 05, 2015
Unknown
We have not received a statement from the vendor.
Notified: March 06, 2015 Updated: March 05, 2015
Unknown
We have not received a statement from the vendor.
Notified: March 06, 2015 Updated: March 05, 2015
Unknown
We have not received a statement from the vendor.
Notified: March 06, 2015 Updated: March 05, 2015
Unknown
We have not received a statement from the vendor.
Notified: March 06, 2015 Updated: March 05, 2015
Unknown
We have not received a statement from the vendor.
Notified: March 06, 2015 Updated: March 05, 2015
Unknown
We have not received a statement from the vendor.
Notified: March 06, 2015 Updated: March 05, 2015
Unknown
We have not received a statement from the vendor.
Notified: March 06, 2015 Updated: March 05, 2015
Unknown
We have not received a statement from the vendor.
Notified: March 06, 2015 Updated: March 05, 2015
Unknown
We have not received a statement from the vendor.
Notified: March 06, 2015 Updated: March 05, 2015
Unknown
We have not received a statement from the vendor.
Notified: March 06, 2015 Updated: March 05, 2015
Unknown
We have not received a statement from the vendor.
Notified: March 06, 2015 Updated: March 05, 2015
Unknown
We have not received a statement from the vendor.
View all 25 vendors __View less vendors __
Group | Score | Vector |
---|---|---|
Base | 7.8 | AV:N/AC:L/Au:N/C:C/I:N/A:N |
Temporal | 6.4 | E:F/RL:OF/RC:C |
Environmental | 6.4 | CDP:ND/TD:H/CR:ND/IR:ND/AR:ND |
This vulnerability was reported by researchers from INRIA, Microsoft Research, and IMDEA.
This document was written by Garret Wassermann.
CVE IDs: | None |
---|---|
Date Public: | 2015-03-06 Date First Published: |