MSIE PNG zlib API misuse bug DoS

2014.08.05

Credit: Michal Zalewski

Risk: Medium

Local: No

Remote: Yes

CVE: N/A

CWE: N/A

Heh,

look at windowscodecs!SPNGREAD::CbReadBytes. 

It doesn't handle Z_NEED_DICT so infinite loop in IE. 

Via @lcamtuf 
http://lcamtuf.coredump.cx/000082-000000-ck.png 

References:

http://lcamtuf.coredump.cx/000082-000000-ck.png

https://twitter.com/taviso/status/484032144801398784

http://lcamtuf.blogspot.nl/2014/08/a-bit-more-about-american-fuzzy-lop.html

See this note in RAW Version

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MSIE PNG zlib API misuse bug DoS

References:

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