Vulnerabilities > CVE-2008-4823 - Cross-Site Scripting vulnerability in Adobe Flash Player
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
NONE Integrity impact
PARTIAL Availability impact
NONE Summary
Cross-site scripting (XSS) vulnerability in Adobe Flash Player 9.0.124.0 and earlier allows remote attackers to inject arbitrary web script or HTML via vectors related to loose interpretation of an ActionScript attribute.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Cross Site Scripting through Log Files An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
- Embedding Scripts in Non-Script Elements This attack is a form of Cross-Site Scripting (XSS) where malicious scripts are embedded in elements that are not expected to host scripts such as image tags (<img>), comments in XML documents (< !-CDATA->), etc. These tags may not be subject to the same input validation, output validation, and other content filtering and checking routines, so this can create an opportunity for an attacker to tunnel through the application's elements and launch a XSS attack through other elements. As with all remote attacks, it is important to differentiate the ability to launch an attack (such as probing an internal network for unpatched servers) and the ability of the remote attacker to collect and interpret the output of said attack.
- Embedding Scripts within Scripts An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
- Cross-Site Scripting in Error Pages An attacker distributes a link (or possibly some other query structure) with a request to a third party web server that is malformed and also contains a block of exploit code in order to have the exploit become live code in the resulting error page. When the third party web server receives the crafted request and notes the error it then creates an error message that echoes the malformed message, including the exploit. Doing this converts the exploit portion of the message into to valid language elements that are executed by the viewing browser. When a victim executes the query provided by the attacker the infected error message error message is returned including the exploit code which then runs in the victim's browser. XSS can result in execution of code as well as data leakage (e.g. session cookies can be sent to the attacker). This type of attack is especially dangerous since the exploit appears to come from the third party web server, who the victim may trust and hence be more vulnerable to deception.
- Cross-Site Scripting Using Alternate Syntax The attacker uses alternate forms of keywords or commands that result in the same action as the primary form but which may not be caught by filters. For example, many keywords are processed in a case insensitive manner. If the site's web filtering algorithm does not convert all tags into a consistent case before the comparison with forbidden keywords it is possible to bypass filters (e.g., incomplete black lists) by using an alternate case structure. For example, the "script" tag using the alternate forms of "Script" or "ScRiPt" may bypass filters where "script" is the only form tested. Other variants using different syntax representations are also possible as well as using pollution meta-characters or entities that are eventually ignored by the rendering engine. The attack can result in the execution of otherwise prohibited functionality.
Nessus
NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2008-0945.NASL description An updated Adobe Flash Player package that fixes several security issues is now available for Red Hat Enterprise Linux 5 Supplementary. This update has been rated as having critical security impact by the Red Hat Security Response Team. [Updated 18th November 2008] The erratum has been updated to include references to the additional CVE-named issues that were not public at the time of release. The security impact of the erratum has also been upgraded to Critical. No changes have been made to the packages. The flash-plugin package contains a Firefox-compatible Adobe Flash Player Web browser plug-in. A flaw was found in the way Adobe Flash Player wrote content to the clipboard. A malicious SWF file could populate the clipboard with a URL that could cause the user to mistakenly load an attacker-controlled URL. (CVE-2008-3873) A flaw was found which allowed Adobe Flash Player last seen 2020-06-01 modified 2020-06-02 plugin id 63869 published 2013-01-24 reporter This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/63869 title RHEL 5 : flash-plugin (RHSA-2008:0945) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2008-0980.NASL description An updated Adobe Flash Player package that fixes several security issues is now available for Red Hat Enterprise Linux 3 and 4 Extras. This update has been rated as having critical security impact by the Red Hat Security Response Team. [Updated 18th November 2008] This erratum has been updated to include a reference to the additional CVE-named issue that was not public at the time of release. The security impact of the erratum has also been upgraded to Critical. No changes have been made to the packages. The flash-plugin package contains a Firefox-compatible Adobe Flash Player Web browser plug-in. A flaw was found in the way Adobe Flash Player wrote content to the clipboard. A malicious SWF (Shockwave Flash) file could populate the clipboard with a URL that could cause the user to accidentally or mistakenly load an attacker-controlled URL. (CVE-2008-3873) A flaw was found with Adobe last seen 2020-06-01 modified 2020-06-02 plugin id 63870 published 2013-01-24 reporter This script is Copyright (C) 2013-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/63870 title RHEL 3 / 4 : flash-plugin (RHSA-2008:0980) NASL family MacOS X Local Security Checks NASL id MACOSX_10_5_6.NASL description The remote host is running a version of Mac OS X 10.5.x that is prior to 10.5.6. Mac OS X 10.5.6 contains security fixes for the following products : - ATS - BOM - CoreGraphics - CoreServices - CoreTypes - Flash Player Plug-in - Kernel - Libsystem - Managed Client - network_cmds - Podcast Producer - UDF last seen 2020-06-01 modified 2020-06-02 plugin id 35111 published 2008-12-16 reporter This script is Copyright (C) 2008-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/35111 title Mac OS X 10.5.x < 10.5.6 Multiple Vulnerabilities NASL family Windows NASL id ADOBE_AIR_APSB08-23.NASL description According to its version number, an instance of Adobe AIR on the remote Windows host is 1.1 or earlier. Such versions are potentially affected by several vulnerabilities (APSB08-23 / APSB08-22 / APSB08-20 / APSB08-18): - A potential port-scanning issue. (CVE-2007-4324) - Possible privilege escalation attacks against web servers hosting Flash content and cross-domain policy files. (CVE-2007-6243) - Potential Clipboard attacks. (CVE-2008-3873) - FileReference upload and download APIs that don last seen 2020-06-01 modified 2020-06-02 plugin id 34815 published 2008-11-18 reporter This script is Copyright (C) 2008-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/34815 title Adobe AIR < 1.5 Multiple Vulnerabilities (APSB08-23) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-200903-23.NASL description The remote host is affected by the vulnerability described in GLSA-200903-23 (Adobe Flash Player: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Adobe Flash Player: The access scope of SystemsetClipboard() allows ActionScript programs to execute the method without user interaction (CVE-2008-3873). The access scope of FileReference.browse() and FileReference.download() allows ActionScript programs to execute the methods without user interaction (CVE-2008-4401). The Settings Manager controls can be disguised as normal graphical elements. This so-called last seen 2020-06-01 modified 2020-06-02 plugin id 35904 published 2009-03-11 reporter This script is Copyright (C) 2009-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/35904 title GLSA-200903-23 : Adobe Flash Player: Multiple vulnerabilities NASL family Windows NASL id FLASH_PLAYER_APSB08-20.NASL description According to its version number, an instance of Flash Player on the remote Windows host is 9.0.124.0 or earlier. Such versions are potentially affected by several vulnerabilities : - A potential port-scanning issue. (CVE-2007-4324) - Possible privilege escalation attacks against web servers hosting Flash content and cross-domain policy files. (CVE-2007-6243) - Potential Clipboard attacks. (CVE-2008-3873) - FileReference upload and download APIs that don last seen 2020-06-01 modified 2020-06-02 plugin id 34741 published 2008-11-11 reporter This script is Copyright (C) 2008-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/34741 title Flash Player < 9.0.151.0 / 10.0.12.36 Multiple Vulnerabilities (APSB08-18 / APSB08-20 / APSB08-22) NASL family MacOS X Local Security Checks NASL id MACOSX_SECUPD2008-008.NASL description The remote host is running a version of Mac OS X 10.4 that does not have Security Update 2008-008 applied. This security update contains fixes for the following products : - BOM - CoreGraphics - CoreServices - Flash Player Plug-in - Libsystem - network_cmds - UDF last seen 2020-06-01 modified 2020-06-02 plugin id 35110 published 2008-12-16 reporter This script is Copyright (C) 2008-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/35110 title Mac OS X Multiple Vulnerabilities (Security Update 2008-008)
Redhat
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References
- http://lists.apple.com/archives/security-announce//2008//Dec/msg00000.html
- http://secunia.com/advisories/32702
- http://secunia.com/advisories/33179
- http://secunia.com/advisories/33390
- http://secunia.com/advisories/34226
- http://security.gentoo.org/glsa/glsa-200903-23.xml
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-248586-1
- http://support.apple.com/kb/HT3338
- http://support.avaya.com/elmodocs2/security/ASA-2008-440.htm
- http://support.avaya.com/elmodocs2/security/ASA-2009-020.htm
- http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&DocumentOID=834256&poid=
- http://www.adobe.com/support/security/bulletins/apsb08-20.html
- http://www.redhat.com/support/errata/RHSA-2008-0980.html
- http://www.securityfocus.com/bid/32129
- http://www.securitytracker.com/id?1021151
- http://www.us-cert.gov/cas/techalerts/TA08-350A.html
- http://www.vupen.com/english/advisories/2008/3444