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Secunia Security Advisory 34411

Secunia Security Advisory 34411
Posted Mar 25, 2009
Authored by Secunia | Site secunia.com

Secunia Security Advisory - 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).

tags | advisory, denial of service, vulnerability
SHA-256 | 00756de4697604fc22a3771b8a26704e6981a1c4a7c3861b59e083de2d382552

Secunia Security Advisory 34411

Change Mirror Download
----------------------------------------------------------------------

Secunia is pleased to announce the release of the annual Secunia
report for 2008.

Highlights from the 2008 report:
* Vulnerability Research
* Software Inspection Results
* Secunia Research Highlights
* Secunia Advisory Statistics

Request the full 2008 Report here:
http://secunia.com/advisories/try_vi/request_2008_report/

Stay Secure,

Secunia


----------------------------------------------------------------------

TITLE:
OpenSSL Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA34411

VERIFY ADVISORY:
http://secunia.com/advisories/34411/

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

----------------------------------------------------------------------

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

Subscribe:
http://secunia.com/advisories/secunia_security_advisories/

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


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------

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