var-201010-0410
Vulnerability from variot
Adobe Reader and Acrobat 8.x before 8.2.5 and 9.x before 9.4 on Mac OS X allow attackers to execute arbitrary code or cause a denial of service (memory corruption) via unspecified vectors. Adobe Acrobat and Reader are prone to a remote memory-corruption vulnerability. Attackers can exploit this issue to execute arbitrary code in the context of the user running the affected application. Adobe Reader and Acrobat versions prior to and including 9.3.4 and 8.2.4 are affected.
I.
An attacker could exploit these vulnerabilities by convincing a user to open a specially crafted PDF file. The Adobe Reader browser plug-in, which can automatically open PDF documents hosted on a website, is available for multiple web browsers and operating systems.
Additional information is available in US-CERT Vulnerability Note VU#491991.
II. Impact
These vulnerabilities could allow a remote attacker to execute arbitrary code, write arbitrary files or folders to the file system, escalate local privileges, or cause a denial of service on an affected system as the result of a user opening a malicious PDF file.
III. Solution
Update
Adobe has released updates to address this issue.
Disable JavaScript in Adobe Reader and Acrobat
Disabling JavaScript may prevent some exploits from resulting in code execution. Acrobat JavaScript can be disabled using the Preferences menu (Edit -> Preferences -> JavaScript; uncheck Enable Acrobat JavaScript).
Adobe provides a framework to blacklist specific JavaScipt APIs. If JavaScript must be enabled, this feature may be useful when specific APIs are known to be vulnerable or used in attacks.
Prevent Internet Explorer from automatically opening PDF files
The installer for Adobe Reader and Acrobat configures Internet Explorer to automatically open PDF files without any user interaction. This behavior can be reverted to a safer option that prompts the user by importing the following as a .REG file:
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\AcroExch.Document.7] "EditFlags"=hex:00,00,00,00
Disable the display of PDF files in the web browser
Preventing PDF files from opening inside a web browser will partially mitigate this vulnerability. If this workaround is applied, it may also mitigate future vulnerabilities.
To prevent PDF files from automatically being opened in a web browser, do the following:
- Open the Edit menu.
- Choose the Preferences option.
- Choose the Internet section.
- Uncheck the "Display PDF in browser" checkbox.
Do not access PDF files from untrusted sources
Do not open unfamiliar or unexpected PDF files, particularly those hosted on websites or delivered as email attachments. Please see Cyber Security Tip ST04-010.
IV. References
-
Security update available for Adobe Reader and Acrobat - http://www.adobe.com/support/security/bulletins/apsb10-21.html
-
US-CERT Vulnerability Note VU#491991 - http://www.kb.cert.org/vuls/id/491991
-
Adobe Reader and Acrobat JavaScript Blacklist Framework - http://kb2.adobe.com/cps/504/cpsid_50431.html
The most recent version of this document can be found at:
<http://www.us-cert.gov/cas/techalerts/TA10-279A.html>
Feedback can be directed to US-CERT Technical Staff. Please send email to cert@cert.org with "TA10-279A Feedback VU#491991" in the subject.
For instructions on subscribing to or unsubscribing from this mailing list, visit http://www.us-cert.gov/cas/signup.html.
Produced 2010 by US-CERT, a government organization.
Terms of use:
<http://www.us-cert.gov/legal.html>
Revision History
October 06, 2010: Initial release
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9.4 on Mac OS X allow attackers to execute arbitrary code or cause a denial of service (memory corruption) via unspecified vectors. Adobe Acrobat and Reader are prone to a remote memory-corruption vulnerability. \nAttackers can exploit this issue to execute arbitrary code in the context of the user running the affected application. \nAdobe Reader and Acrobat versions prior to and including 9.3.4 and 8.2.4 are affected. \n\n\nI. \n\n An attacker could exploit these vulnerabilities by convincing a\n user to open a specially crafted PDF file. The Adobe Reader browser\n plug-in, which can automatically open PDF documents hosted on a\n website, is available for multiple web browsers and operating\n systems. \n\n Additional information is available in US-CERT Vulnerability Note\n VU#491991. \n\n\nII. Impact\n\n These vulnerabilities could allow a remote attacker to execute\n arbitrary code, write arbitrary files or folders to the file\n system, escalate local privileges, or cause a denial of service on\n an affected system as the result of a user opening a malicious PDF\n file. \n\n\nIII. Solution\n\n Update\n\n Adobe has released updates to address this issue. \n\n Disable JavaScript in Adobe Reader and Acrobat\n\n Disabling JavaScript may prevent some exploits from resulting in\n code execution. Acrobat JavaScript can be disabled using the\n Preferences menu (Edit -\u003e Preferences -\u003e JavaScript; uncheck Enable\n Acrobat JavaScript). \n\n Adobe provides a framework to blacklist specific JavaScipt APIs. If\n JavaScript must be enabled, this feature may be useful when\n specific APIs are known to be vulnerable or used in attacks. \n\n Prevent Internet Explorer from automatically opening PDF files\n\n The installer for Adobe Reader and Acrobat configures Internet\n Explorer to automatically open PDF files without any user\n interaction. This behavior can be reverted to a safer option that\n prompts the user by importing the following as a .REG file:\n\n Windows Registry Editor Version 5.00\n\n [HKEY_CLASSES_ROOT\\AcroExch.Document.7]\n \"EditFlags\"=hex:00,00,00,00\n\n Disable the display of PDF files in the web browser\n\n Preventing PDF files from opening inside a web browser will\n partially mitigate this vulnerability. If this workaround is\n applied, it may also mitigate future vulnerabilities. \n\n To prevent PDF files from automatically being opened in a web\n browser, do the following:\n\n 1. \n 2. Open the Edit menu. \n 3. Choose the Preferences option. \n 4. Choose the Internet section. \n 5. Uncheck the \"Display PDF in browser\" checkbox. \n\n Do not access PDF files from untrusted sources\n\n Do not open unfamiliar or unexpected PDF files, particularly those\n hosted on websites or delivered as email attachments. Please see\n Cyber Security Tip ST04-010. \n\n\nIV. References\n\n * Security update available for Adobe Reader and Acrobat -\n \u003chttp://www.adobe.com/support/security/bulletins/apsb10-21.html\u003e\n\n * US-CERT Vulnerability Note VU#491991 -\n \u003chttp://www.kb.cert.org/vuls/id/491991\u003e\n\n * Adobe Reader and Acrobat JavaScript Blacklist Framework -\n \u003chttp://kb2.adobe.com/cps/504/cpsid_50431.html\u003e\n\n ____________________________________________________________________\n\n The most recent version of this document can be found at:\n\n \u003chttp://www.us-cert.gov/cas/techalerts/TA10-279A.html\u003e\n ____________________________________________________________________\n\n Feedback can be directed to US-CERT Technical Staff. Please send\n email to \u003ccert@cert.org\u003e with \"TA10-279A Feedback VU#491991\" in\n the subject. \n ____________________________________________________________________\n\n For instructions on subscribing to or unsubscribing from this\n mailing list, visit \u003chttp://www.us-cert.gov/cas/signup.html\u003e. \n ____________________________________________________________________\n\n Produced 2010 by US-CERT, a government organization. \n\n Terms of use:\n\n \u003chttp://www.us-cert.gov/legal.html\u003e\n ____________________________________________________________________\n\nRevision History\n\n October 06, 2010: Initial release\n\n\n-----BEGIN PGP SIGNATURE-----\nVersion: GnuPG v1.4.5 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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.