Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

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
Comments
Newest First  |  Oldest First  |  Threaded View
News
Inside the Ransomware Campaigns Targeting Exchange Servers
Kelly Sheridan, Staff Editor, Dark Reading,  4/2/2021
Commentary
Beyond MITRE ATT&CK: The Case for a New Cyber Kill Chain
Rik Turner, Principal Analyst, Infrastructure Solutions, Omdia,  3/30/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
2021 Top Enterprise IT Trends
We've identified the key trends that are poised to impact the IT landscape in 2021. Find out why they're important and how they will affect you today!
Flash Poll
How Enterprises are Developing Secure Applications
How Enterprises are Developing Secure Applications
Recent breaches of third-party apps are driving many organizations to think harder about the security of their off-the-shelf software as they continue to move left in secure software development practices.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2021-3493
PUBLISHED: 2021-04-17
The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces the setting of file capabilities on files in an underlying file system. Due to the combination of unprivileged user namespaces along with a patch carried in the Ubuntu kernel to allow unprivile...
CVE-2021-3492
PUBLISHED: 2021-04-17
Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring during copy_from_user() correctly. These could lead to either a double-free situation or memory not being freed at all. An attacker could use this to cause a denial of service (ker...
CVE-2020-2509
PUBLISHED: 2021-04-17
A command injection vulnerability has been reported to affect QTS and QuTS hero. If exploited, this vulnerability allows attackers to execute arbitrary commands in a compromised application. We have already fixed this vulnerability in the following versions: QTS 4.5.2.1566 Build 20210202 and later Q...
CVE-2020-36195
PUBLISHED: 2021-04-17
An SQL injection vulnerability has been reported to affect QNAP NAS running Multimedia Console or the Media Streaming add-on. If exploited, the vulnerability allows remote attackers to obtain application information. QNAP has already fixed this vulnerability in the following versions of Multimedia C...
CVE-2021-29445
PUBLISHED: 2021-04-16
jose-node-esm-runtime is an npm package which provides a number of cryptographic functions. In versions prior to 3.11.4 the AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed `JWEDe...