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botM to netsecEnglish · 7 days ago

TightVNC Viewer Pre-auth RCE

ssd-disclosure.com

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TightVNC Viewer Pre-auth RCE

ssd-disclosure.com

botM to netsecEnglish · 7 days ago
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TightVNC Viewer Pre-auth RCE - SSD Secure Disclosure
ssd-disclosure.com
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Summary In VNC the server announces the screen size and the viewer allocates a pixel buffer for it. TightVNC computes that buffer’s byte size in a 32-bit int. A server announcing 32768 x 32769 at 32bpp makes the size wrap from 4 GB to 128 KB, while the viewer keeps the announced dimensions as its … TightVNC Viewer Pre-auth RCE Read More »
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    7 days ago

    Original Reddit thread — view the discussion and comments on Reddit.

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