Description:
Adobe Acrobat is a program designed to create, manage and view Portable Document Format (PDF) and Adobe Reader is designed to only view and print PDF’s. Both Adobe Acrobat and Reader have buffer overflow vulnerabilities while handling JBIG2 streams inside a PDF file. JBIG2 is an image encoding standard for encoding bi-level images. One of the flaws is due to a four byte value which represents the number of values in a table and is used to allocate a buffer. This value is taken from the file without adequate checking and a specially crafted PDF file can be used to overflow the buffer. The other flaw is due to a malformed JBIG2 symbol dictionary segment contained in a malicious PDF file. There are still some other unspecified errors in the processing of this JBIG2 streams. Potential vectors of attack are sending the malicious PDF document as an email attachment, or enticing the victim to visit the website that has malicious document – which can be achieved via iframes, or placing the document on a file share. In either case the attacker has to convince the victim to open the files. Successful exploitation can lead to code execution. Some technical details are publicly available.

Affected:Adobe Acrobat Standard 8.1.3 and prior
Adobe Acrobat Standard 7.0.8 and prior
Adobe Acrobat Standard 9
Adobe Acrobat Standard 8.1 and prior
Adobe Acrobat Standard 7.1
Adobe Acrobat Reader (UNIX) 7.0.1 and prior
Adobe Acrobat Reader 8.1.3 and prior
Adobe Acrobat Reader 7.0.9 and prior
Adobe Acrobat Reader 9
Adobe Acrobat Reader 8.1 and prior
Adobe Acrobat Reader 7.1
Adobe Acrobat Professional 8.1.3 and prior
Adobe Acrobat Professional 7.0.9 and prior
Adobe Acrobat Professional 9
Adobe Acrobat Professional 8.1 and prior
Adobe Acrobat Professional 7.1
Adobe Acrobat 7.0.3 and prior