https://bz.apache.org/bugzilla/show_bug.cgi?id=60343
Bug ID: 60343
Summary: Add bounds checking on style offsets in StylesTable
Product: POI
Version: 3.16-dev
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: XSSF
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
On TIKA-2155, Seva Alekseyev supplied an xlsx that triggers an index out of
bounds exception when trying to get a style from the StylesTable. I haven't
tried to open the file in Excel, but Seva has opened it. The offending value
in sheet67.xml is: <c r="L95" s="65535"/>... truly a bad value.
Stack:
java.lang.IndexOutOfBoundsException: Index: 65535, Size: 251
at java.util.ArrayList.rangeCheck(ArrayList.java:653)
at java.util.ArrayList.get(ArrayList.java:429)
at
org.apache.poi.xssf.model.StylesTable.getStyleAt(StylesTable.java:421)
at
org.apache.poi.xssf.eventusermodel.XSSFSheetXMLHandler.startElement(XSSFSheetXMLHandler.java:282)
My inclination is to add bounds checking to StylesTable and return null if a
style is requested outside of the list range. I'll leave this open for a few
days to make sure there are no objections from colleagues that this is making
the parser too lax.
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