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TITLE:
Microsoft Office Excel Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA45932

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/45932/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=45932

RELEASE DATE:
2011-09-13

DISCUSS ADVISORY:
http://secunia.com/advisories/45932/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/45932/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=45932

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Multiple vulnerabilities have been reported in Microsoft Office
Excel, which can be exploited by malicious people to compromise a
user's system.

1) A use-after-free error when parsing unspecified data can be
exploited to dereference already freed memory.

2) An array-indexing error when parsing unspecified data can be
exploited to corrupt memory.

3) An error when parsing unspecified data can be exploited to corrupt
heap-based memory.

4) An unspecified error when parsing a particular type of conditional
expression can be exploited to corrupt memory.

5) A signedness error when parsing unspecified data can be exploited
to corrupt memory.

Successful exploitation of the vulnerabilities allows execution of
arbitrary code via specially crafted Excel files.

SOLUTION:
Apply patches.

Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

PROVIDED AND/OR DISCOVERED BY:
The vendor credits:
1) An anonymous person via iDefense
2) Sean Larsson, VeriSign iDefense Labs
3) An anonymous person via iDefense
4) An anonymous person via ZDI
5) Omair via ZDI

ORIGINAL ADVISORY:
MS11-072 (KB2553070, KB2553072, KB2553073, KB2553074, KB2553075,
KB2553095, KB2553096, KB2553089, KB2553090, KB2553091, KB2553093,
KB2553094, KB2587505, KB2598781, KB2598782, KB2598783, KB2598785):
http://technet.microsoft.com/en-us/security/bulletin/ms11-072

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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

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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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