An issue was discovered in Artifex Software, Inc. MuJS before 4006739a28367c708dea19aeb19b8a1a9326ce08. The jsR_setproperty function in jsrun.c lacks a check for a negative array length. This leads to an integer overflow in the js_pushstring function in jsrun.c when parsing a specially crafted JS file.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| http://git.ghostscript.com/?p=mujs.git%3Bh=4006739a28367c708dea19aeb19b8a1a9326ce08 | |
| http://www.securityfocus.com/bid/95856 | third party advisory vdb entry |
| https://bugs.ghostscript.com/show_bug.cgi?id=697497 | issue tracking |