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Insecure Library Loading
Moderately critical

OpenSSL Multiple Vulnerabilities

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Release Date:  2009-03-25    Views:  11,801

Secunia Advisory SA34411

Where:

From remote

Impact:

Security Bypass, DoS

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


Some vulnerabilities have been reported in OpenSSL, which can be exploited by malicious people to bypass certain security restrictions or cause a DoS (Denial of Service).

1) An error exists in the "ASN1_STRING_print_ex()" function when printing "BMPString" or "UniversalString" strings. This can be exploited to trigger an access to invalid memory and cause a crash via an illegal encoded string length when e.g. printing the contents of a certificate.

2) The "CMS_verify()" function incorrectly handles an error condition when processing malformed signed attributes. This can be exploited to trick an application into considering a malformed set of signed attributes valid and skip further checks.

NOTE: This vulnerability only affects OpenSSL versions 0.9.8h and later with CMS enabled (disabled by default).

Successful exploitation requires access to a previously generated invalid signature.

3) An error when processing malformed ASN1 structures can be exploited to trigger an access to invalid memory and cause a crash via a specially crafted certificate.

NOTE: This vulnerability is only present on platforms where the size of "long" is smaller than the size of "void *" (e.g. WIN64).

The vulnerabilities are reported in versions prior to 0.9.8k.


Solution:
Update to version 0.9.8k.

Provided and/or discovered by:
1) Reported by the vendor.
2) The vendor credits Ivan Nestlerode of IBM.
3) The vendor credits Paolo Ganci.

Original Advisory:
http://www.openssl.org/news/secadv_20090325.txt

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: OpenSSL Multiple Vulnerabilities

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