[security-alerts] FW: [SA21709] OpenSSL RSA Signature Forgery Vulnerability

["Kazennov, Vladimir" <Vladimir.Kazennov@xxxxxxxxxx>]

> ----------------------------------------------------------------------
> 
> TITLE:
> OpenSSL RSA Signature Forgery Vulnerability
> 
> SECUNIA ADVISORY ID:
> SA21709
> 
> VERIFY ADVISORY:
> http://secunia.com/advisories/21709/
> 
> CRITICAL:
> Less critical
> 
> IMPACT:
> Security Bypass
> 
> WHERE:
> From remote
> 
> SOFTWARE:
> OpenSSL 0.9.x
> http://secunia.com/product/253/
> 
> DESCRIPTION:
> A vulnerability has been reported in OpenSSL, which potentially can
> be exploited by malicious people to bypass certain security
> restrictions.
> 
> The vulnerability is caused due to an error within the verification
> of certain signatures. If an RSA key with exponent 3 is used, it may
> be possible to forge a PKCS #1 v1.5 signature signed by that key.
> 
> The vulnerability is reported in versions 0.9.7j and 0.9.8b. Prior
> versions may also be affected.
> 
> SOLUTION:
> OpenSSL 0.9.7 branch:
> Update to version 0.9.7k or later.
> 
> OpenSSL 0.9.8 branch:
> Update to version 0.9.8c or later.
> 
> PROVIDED AND/OR DISCOVERED BY:
> Daniel Bleichenbacher
> 
> ORIGINAL ADVISORY:
> http://www.openssl.org/news/secadv_20060905.txt
>