Jbig2decode pdf vulnerability testing

As this is the case with the jbig2decode vulnerability in pdf documents, i took the time to produce a short video showing 3 ways the vulnerability can trigger without even opening the pdf document. Adobe acrobatreader jbig2decode buffer overflow vulnerability. Testing for security vulnerabilities in web applications. Adobe acrobat reader jbig2 local buffer overflow poc 2. As this is the case with the jbig2decode vulnerability in pdf. Does a buffer overflow vulnerability always mean a code execution vulnerability. Almost all malicious pdf documents that ive found in the wild contain javascript to exploit a javascript vulnerability andor to execute a heap spray. Whenever there is a critical vulnerability in a product that is used frequently, we perform an internal binary analysis in order to get a complete picture of the vulnerability and write reliable countermeasures for it. Background geriatric assessment is an appropriate method for identifying older cancer patients at risk of lifethreatening events during therapy. An exploitable outofbounds read vulnerability exists in the handling of jbig2decode object stream attributes of nitro pdf reader version 12. Cannot import pdf with jpxdecode or jbig2decode filters. Penetration testing is about ignoring an organizations perception of its security and probing its systems for weaknesses. Today i took a closer look at the pdf code of the jbig2decode vulnerability.

Vulnerability assessment is the gateway through which threats are discovered. We cannot determine whether this unreadable content is a malicious content or just a usual content for pdf document. Out of 689 pdfs using the jbig2decode filter, 525 were malicious. However, the code behind the nitro uses famous library known jbig2decode. Contagio is a collection of the latest malware samples, threats, observations, and analyses.

After you download it, you can run following command line to compress a normal scanned pdf file with jbig2 compression, pdfcompressor. Nitro pro from fuzzing to multiple heap corruption. The software itself is a commercial pdf software that supports create, edit, sign and securing pdf files. Specifically your code is failing because that pdf has images encoded as jbig2decode. This example illustrates how to decode a pdf file to extract plain text. With adobes patch for the current pdf vulnerability still some time away, news has emerged of more techniques that are available to exploit the vulnerability, this time without needing the victim to actually open a malicious file. Js and javascript indicate that the pdf document contains javascript. This study aims to identify the best screening tool to identify older cancer patients requiring geriatric assessment by comparing the performance of two short. Yet, it is underused in practice, mainly because it is time and resourceconsuming. Instead, the methods make use of a windows explorer shell extension that is installed alongside. Nitro pdf 12 multiple remote code execution vulnerability. Security vulnerabilities, exploits, vulnerability statistics, cvss scores and references e. Penetration testing with kali linux pwk 2x the content 33% more lab machines. This indirect object is all i have to include in my basic pdf document to get a poc pdf document to crash adobe acrobat reader 9.

Dynamic application security testing insightconnect. Alright, everything seems normal except the unreadable content between stream and endstream. This tool is not a pdf parser, but it will scan a file to look for certain pdf keywords, allowing you to identify pdf documents that contain for example javascript or execute an action when opened. Hack any remote pc with adobe jbig2decode heap corruption. Vulnerability description cve20090658 cve20110609 cve20110611 cve20103971 cve20100806 cve20091671 cve20104452 affected versions adobe reader 9. En test har ogsa blitt gjennomfort i et virkelig scenario ved a. Whenever there is a critical vulnerability in a product that is used frequently, we perform an internal binary analysis. Vulnerability assessment and penetration testing are used for prevention of attacks on application services 2.

It doesnt have to be an xobject, just a stream object with a jbig2decode filter. Screening for vulnerability in older cancer patients. This module exploits an array indexing vulnerability in adobe reader when handling a specially crafted pdf file. Pdfjbig2decodefilter properties pdfjbig2decodefilter methods the jbig2decode filter pdf 1. Analysis of cve20090658 adobe reader 0day secureworks. If the pdf document contains a malformed jbig2decode stream object, it will result in an access violation in the instruction at 001a7d89a. Vulnerability assessment is a process to evaluate the security risks in the software system in order to reduce the probability of a threat.

The new method is more than a specific, patchable vulnerability. An exploitable heap corruption vulnerability exists in the handling of jbig2decode object stream attributes of nitro pdf reader version. The assessment is done by carrying out threat degree verification on the clients vulnerability level using the vulnerability analyzer engine and the security policies of the ebusiness network. Earlier this year, i decided to do some fuzzing on nitro pdf software. Raj chandel is founder and ceo of hacking articles. Contact me via email see my profile for the passwords or the password scheme. So the simplest solution is to use acrobat which will automatically merge them into single tiff files pdfimages extracts layers as separate files. Contribute to rapid7metasploit framework development by creating an account on github. Decode flatedecode pdf stream to plain text using zlib. Nitro pdf 12 multiple remote code execution vulnerability nafiez. The vulnerability can be exploited reliably without using javascript.

Oval open vulnerability and assessment language definitions define exactly what should be done to. A specially crafted pdf document can trigger a heap corruption, which can disclose sensitive memory content and aid in exploitation when coupled with another vulnerability. Use it to developed better signatures or to test your defenses. Note also that in your pdf the scanned color images are converted into stacks of layers each encoded either as jpeg2000 which mathematica can import or as jbig2 unsupported by mathematica. The jbig2 compressed pdf file is contain following information, 12 0 obj adobe reader 0day monday, march 9, 2009 by. It is therefore a specialised form of risk assessment. Adobe reader jbig2decode memory corruption exploit core. Sometimes a piece of malware can execute without even opening the file. This is similar to the code project article, code to extract plain text from a pdf file, but this project does not remove any internal pdf text. His works include researching new ways for both offensive and defensive security and has done illustrious research on computer security, exploiting linux and windows, wireless security, computer forensic, securing and exploiting web applications, penetration testing of networks.

Adobe acrobat reader jbig2 local buffer overflow poc. A specially crafted pdf document can trigger an outofbounds read, which can disclose sensitive memory content and aid in exploitation when coupled with another vulnerability. This update adds support for windows xp sp2, windows 2000 professional sp4 and improves reliability when exploiting from browsers. A vulnerability is any mistakes or weakness in the system security procedures, design, implementation or any internal control that may result in the violation of the. Adobe reader jbig2decode memory corruption exploit update. The irony being that you have to open it in a pdf reader.

While early reports suggested that disabling acrobat javascript was sufficient to protect from this vulnerability, this is not the case. The vulnerability is caused by a defect in how adobe reader interprets jbig2 image streams embedded within pdf documents. Acuentix has an easy wizard where you can create a login sequence. If you are using wapiti you can give a cookie to wapiti or give wapiti a post request to fire off but this is kind of tricky. Sans digital forensics and incident response blog pdf. It is a prereleased version in order to deliver a module as quickly as possible to our customers that may be useful in some situations. This tool is not a pdf parser, but it will scan a file to look for certain pdf keywords, allowing you to identify pdf documents that contain for example. A new method of producing malicious pdf files has been discovered by the avast.