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TITLE:
Opera SSL RSA Signature Forgery Vulnerability

SECUNIA ADVISORY ID:
SA21982

VERIFY ADVISORY:
http://secunia.com/advisories/21982/

CRITICAL:
Less critical

IMPACT:
Security Bypass, Spoofing

WHERE:
>From remote

SOFTWARE:
Opera 9.x
http://secunia.com/product/10615/

DESCRIPTION:
A vulnerability has been reported in Opera, which can be exploited by
malicious people to bypass certain security restrictions.

The vulnerability is due to an error within the verification of
certain signatures. This can be exploited to spoof certificates when
the signing certificate uses an RSA public exponent of 3.

This is related to:
SA21709

The vulnerability has been reported in version 9.01. Other versions
may also be affected.

SOLUTION:
Do not use CA certificates with a RSA public exponent of 3.

PROVIDED AND/OR DISCOVERED BY:
Originally reported in OpenSSL by Daniel Bleichenbacher.

Reported in Opera by Erik Tews, Alexander May, and Ralf-Philipp
Weinmann.

ORIGINAL ADVISORY:
http://www.cdc.informatik.tu-darmstadt.de/securebrowser/

OTHER REFERENCES:
SA21709:
http://secunia.com/advisories/21709/

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


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