Perimeter
2/8/2012
11:16 PM
Taher Elgamal
Taher Elgamal
Commentary
50%
50%

RSA Weakness and e-Commerce Authentication

RSA key weakness

The recently disclosed weakness in the RSA keys found on the web created a lot of activity in the scientific and the commercial world. What does that mean to everyday e-commerce transactions and how much trust should we have in them. This particular weakness in some of the RSA keys used in a server certificate for example can enable someone to impersonate a server identity, since an attacker can compute the server’s private key used in signing and authenticating the server to the browsers. This is not a trivial weakness obviously. However, it should not be perceived as an attack on all e-commerce as advertised since the other keys that are generated properly will not have any issue and the trust in them is not affected.

An attack on all e-commerce should have the effect of enabling an attacker to impersonate any server – which is far from reality here. However, this finding does bring a very important issue in generating random numbers and in also generating RSA keys that are not “weak keys”. The software or hardware used to generate keys should be tested against known weaknesses at all times, and customers should ask vendors questions about the process they used to test their cryptographic software. Of course, using other strong cryptographic methods is also a good idea – but also if the keys and random numbers are generated correctly.

Comment  | 
Print  | 
More Insights
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Flash Poll
Title Partner’s Role in Perimeter Security
Title Partner’s Role in Perimeter Security
Considering how prevalent third-party attacks are, we need to ask hard questions about how partners and suppliers are safeguarding systems and data.
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2015-0750
Published: 2015-05-22
The administrative web interface in Cisco Hosted Collaboration Solution (HCS) 10.6(1) and earlier allows remote authenticated users to execute arbitrary commands via crafted input to unspecified fields, aka Bug ID CSCut02786.

CVE-2012-1978
Published: 2015-05-21
Multiple cross-site request forgery (CSRF) vulnerabilities in Simple PHP Agenda 2.2.8 and earlier allow remote attackers to hijack the authentication of administrators for requests that (1) add an administrator via a request to auth/process.php, (2) delete an administrator via a request to auth/admi...

CVE-2015-0741
Published: 2015-05-21
Multiple cross-site request forgery (CSRF) vulnerabilities in Cisco Prime Central for Hosted Collaboration Solution (PC4HCS) 10.6(1) and earlier allow remote attackers to hijack the authentication of arbitrary users, aka Bug ID CSCut04596.

CVE-2015-0742
Published: 2015-05-21
The Protocol Independent Multicast (PIM) application in Cisco Adaptive Security Appliance (ASA) Software 9.2(0.0), 9.2(0.104), 9.2(3.1), 9.2(3.4), 9.3(1.105), 9.3(2.100), 9.4(0.115), 100.13(0.21), 100.13(20.3), 100.13(21.9), and 100.14(1.1) does not properly implement multicast-forwarding registrati...

CVE-2015-0746
Published: 2015-05-21
The REST API in Cisco Access Control Server (ACS) 5.5(0.46.2) allows remote attackers to cause a denial of service (API outage) by sending many requests, aka Bug ID CSCut62022.

Dark Reading Radio
Archived Dark Reading Radio
Join security and risk expert John Pironti and Dark Reading Editor-in-Chief Tim Wilson for a live online discussion of the sea-changing shift in security strategy and the many ways it is affecting IT and business.