Multiple vulnerabilities have been reported in Adobe Reader and Acrobat, which can be exploited by malicious people to conduct cross-site scripting attacks, bypass certain security restrictions, or compromise a user's system.

1) An unspecified error can be exploited to cause a heap-based buffer overflow and execute arbitrary code.

NOTE: This vulnerability is currently being actively exploited.

2) An array indexing error in the processing of Compact Font Format streams can be exploited to corrupt memory.

3) Multiple unspecified errors can be exploited to cause heap-based buffer overflows.

4) An array indexing error in the parsing of U3D files embedded in a PDF file can be exploited to corrupt memory.

5) A use-after-free error in the Firefox plugin can be exploited to trigger usage of uninitialised memory when the plugin is unloaded.

6) A vulnerability exists due to the application not enforcing "Privileged Context" and "Safe Path" restrictions on certain JavaScript methods. This can be exploited to write arbitrary files to arbitrary locations.

7) An array indexing error in the processing of U3D data can be exploited to corrupt memory and execute arbitrary code.

8) An unspecified error can be exploited to cause a heap-based buffer overflow.

9) Two input validation errors can be exploited to execute arbitrary code.

10) An unspecified error can be exploited to corrupt memory.

11) An integer overflow error exists in the processing of BMP files. This can be exploited to cause a heap-based buffer overflow by tricking a user into converting a specially crafted BMP file to PDF.

12) An error when loading and unloading certain COM objects can be exploited to corrupt memory.

13) An integer overflow error can be exploited to cause a crash and potentially execute arbitrary code.

14) An unspecified error in the JavaScript implementation can be exploited to corrupt memory and potentially execute arbitrary code.

15) A format string error can be exploited to execute arbitrary code on UNIX platforms.

Successful exploitation requires that the debug mode is enabled.

16) An unspecified error in the image decoder can be exploited to cause a crash and potentially execute arbitrary code.

Successful exploitation of these vulnerabilities allows execution of arbitrary code.

17) An input validation error can potentially be exploited to bypass Trust Manager restrictions.

18) An unspecified error can be exploited to bypass file extension security controls.

19) Some vulnerabilities in the browser plugin can be exploited by malicious people to conduct cross-site scripting attacks.

For more information:
SA23483

Solution
-- Adobe Reader for Windows --
Further details available to Secunia VIM customers

Provided and/or discovered by
1) Reported as a 0-day by Chia-Ching Fang and the Information and Communication Security Technology Center.
2) Anonymous, reported via ZDI.
3) The vendor credits Will Dormann, CERT.
4) Dionysus Blazakis, reported via iDefense.
5) Elazar Broad, reported via iDefense.
6) Richard van Eeden of IOActive, reported via US-CERT.
7) Felipe Andres Manzano
8, 9) The vendor credits Nicolas Joly of VUPEN Security.
10) Haifei Li of Fortinet's FortiGuard Global Security Research Team.
11) Tielei Wang from ICST-ERCIS (Engineering Research Center of Info Security, Institute of Computer Science & Technology, Peking University / China)
12) SkyLined of Google Inc.
13) The vendor credits Drew Yao of Apple Product Security.
14) Zhenhua Liu and Xiaopeng Zhang of Fortinet's FortiGuard Global Security Research Team.
15, 18) The vendor credits Guillaume Delugré and Frédéric Raynal of SOGETI ESEC.
16) The vendor credits Tavis Ormandy, Google Security Team.
17) The vendor credits Stefano Di Paola of Minded Security.
19) The vendor credits Michael Schmidt of Compass Security.

Changelog
Further details available to Secunia VIM customers

Original Advisory
Adobe:
http://www.adobe.com/support/security/bulletins/apsb09-15.html
http://blogs.adobe.com/psirt/2009/10/adobe_reader_and_acrobat_issue_1.html

ZDI:
http://www.zerodayinitiative.com/advisories/ZDI-09-073/

iDefense:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=827
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=826

US-CERT VU#257117:
http://www.kb.cert.org/vuls/id/257117

SkyLined:
http://skypher.com/index.php/2009/10/13/memory-corruption-when-loadingunloading-adobe-objects-through-embed-tag-in-firefox/

Fortinet FortiGuard:
http://www.fortiguard.com/advisory/FGA-2009-37.html

Felipe Andres Manzano:
http://sites.google.com/site/felipeandresmanzano/

Deep Links
Links available to Secunia VIM customers