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Which is the best way to prevent logjam attacks?
Logjam is a cipher downgrade attack where a man in the middle can trick the end points into using a weak cipher. A weak cipher would allow the man in the middle to easily decrypt intercepted traffic. As with all other cipher downgrade attacks the best way to prevent it is to disable weak ciphers in the first place.
How is the Logjam attack similar to the FREAK attack?
The Logjam attack allows a man-in-the-middle attacker to downgrade vulnerable TLS connections to 512-bit export-grade cryptography. This allows the attacker to read and modify any data passed over the connection. The attack is reminiscent of the FREAK attack, but is due to a flaw in…
What do you call a protocol flaw in logjam?
The Logjam article authors call this a “protocol flaw” because the ServerKeyExchange message that contains the export DH parameters is not tagged as “for export”, and thus is indistinguishable (save for the modulus length) from a ServerKeyExchange message that contains non-export DH parameters.
Is the TLS protocol vulnerable to a logjam?
Logjam shouldn’t really be called a “new” vulnerability – it’s a rehash of FREAK which targets export-grade DH rather than export-grade RSA. The TLS protocol is vulnerable to having its key exchange protocol downgraded by an attacker.
Is it dangerous to use a Logjam vulnerability?
You see, this is dangerous as an attacker can read credit card or sensitive information if your application is vulnerable to Logjam. This reminds me of FREAK attack. Logjam vulnerability can be on any protocols like HTTPS, SSH, IPSec, SMTP that leverage on TLS.
How to test Logjam attack ( cve-2015-4000 and fix?
How to test Logjam Attack (CVE-2015-4000) and fix? Netsparker Web Application Security Scanner – the only solution that delivers automatic verification of vulnerabilities with Proof-Based Scanning™. Get application security done the right way!
How to protect your mobile app from attacks?
Detect whether the app is executing in an insecure environment such as on a rooted (Android) or jailbroken (iOS) device. Mitigate the risks of overlay attacks, debuggers, emulators, and other means by which attackers examine, penetrate, and compromise a mobile app.
How to protect Tomcat 7 against Slowloris attack?
If Tomcat is directly exposed to the Internet (without being teamed up with Apache), then your solution should be one of the following: Set up a reverse-proxy server in front of Tomcat, such as Nginx, Lighttpd, or even Apache. Set up Apache and Tomcat together as traditionally configured.
Is there a fix for Firefox server logjam?
A fix for Firefox in the form of a plugin by Mozilla is available here now. It is expected that other browser vendors (Opera, Chrome…) will soon follow. On the server side, you can explicitly disable support for “export” cipher suites, and generate your own DH parameters.