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Re: [LUG] ssl cracked

 

On Wed, 31 Dec 2008 09:43:08 +0000
Simon Waters <simon@xxxxxxxxxxxxxx> wrote:

> http://www.win.tue.nl/hashclash/rogue-ca/
> 
> This link lists the certificate authorities trusted by Firefox that
> issued MD5 certificates in July 2008.
> 
> Looks like Equifax RapidSSL is the only one of significance.

To check your certificate support in Epiphany, use:
Tools | Manage Certificates

Select the certificates listed on the above link, click View.
Verify that the Details tab lists the Certificate Signature Algorithm
as:
PKCS #1 MD5 With RSA Encryption

Certificates with:
PKCS #1 SHA-1 With RSA Encryption
are currently OK but would be better eventually with SHA-2.

Epiphany shows an SHA1 and MD5 fingerprint for any certificate, it is
the Signature Algorithm that matters for this exploit.

A similar list can be found in firefox/iceweasel from:
Edit|Preferences|Advanced|Encryption
View Certificates

Don't just blindly delete, consider exporting first so that you can
test your regular https:// sites still work.

To check the actual certificates used:
Tools|Page Info|Security
View Certificate
Details
Certificate Signature Algorithm

whilst viewing the relevant page.

Apparently, Launchpad uses SHA-1.
;-)

(You don't have to login to check, just go to the login page - most
login pages are already https:// - or just view the homepage and
change http:// to https:// )

-- 


Neil Williams
=============
http://www.data-freedom.org/
http://www.nosoftwarepatents.com/
http://www.linux.codehelp.co.uk/


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