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TITLE:
OpenSSL Multiple Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA22130

VERIFY ADVISORY:
http://secunia.com/advisories/22130/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
OpenSSL 0.9.x
http://secunia.com/product/253/

DESCRIPTION:
Some vulnerabilities have been reported in OpenSSL, which can be
exploited by malicious people to cause a DoS (Denial of Service).

1) An error in the processing of certain invalid ASN.1 structures can
be exploited to cause an infinite loop and consume system memory in an
application using OpenSSL to process ASN.1 data from untrusted
sources.

NOTE: This does not affect versions prior to 0.9.7.

2) Certain types of public keys take overly long time to process and
can be exploited to cause a DoS in an application using OpenSSL to
process ASN.1 data from untrusted sources.

3) An error in the "SSL_get_shared_ciphers()" function can be
exploited to cause a buffer overflow by sending a list of ciphers to
an application using the vulnerable function.

4) An error in the SSLv2 client code can be exploited by a malicious
server to crash a vulnerable client using OpenSSL to create an SSLv2
connection to the server.

SOLUTION:
OpenSSL 0.9.7 branch:
Update to version 0.9.7l or later.

OpenSSL 0.9.8 branch:
Update to version 0.9.8d or later.

PROVIDED AND/OR DISCOVERED BY:
1, 2) Dr. S. N. Henson, Open Network Security
3, 4) Tavis Ormandy and Will Drewry, Google Security Team

ORIGINAL ADVISORY:
http://www.openssl.org/news/secadv_20060928.txt

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About:
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