null pointer dereference - xpdf 2.x

poc.sh

xpdf v2.0
PoC: https://gofile.io/?c=grUzbG

$ gdb ./pdfinfo
(gdb) run out/crashes/id:000000,sig:11,src:000000,op:flip1,pos:2971
Starting program: /home/input0/Downloads/xpdf-2.00/xpdf/pdfinfo out/crashes/id:000000,sig:11,src:000000,op:flip1,pos:2971
Error (2978): Dictionary key must be a name object
Error (2980): Dictionary key must be a name object
Error (2982): Dictionary key must be a name object
Error (2989): Dictionary key must be a name object
Error (0): PDF file is damaged - attempting to reconstruct xref table...

Program received signal SIGSEGV, Segmentation fault.
0x00000000004be249 in XRef::constructXRef (this=<optimized out>) at XRef.cc:421
421		      if (!entries[num].used || gen >= entries[num].gen) {
(gdb) bt
#0  0x00000000004be249 in XRef::constructXRef (this=<optimized out>) at XRef.cc:421
#1  0x00000000004bd13f in XRef::XRef (this=0x741ea0, strA=<optimized out>, ownerPassword=0x0, userPassword=0x0) at XRef.cc:72
#2  0x000000000049d0fb in PDFDoc::setup (this=0x740cd0, ownerPassword=0x3, userPassword=0x3) at PDFDoc.cc:120
#3  0x000000000049cf3d in PDFDoc::PDFDoc (this=0x740cd0, fileNameA=<optimized out>, ownerPassword=0x0, userPassword=0x0) at PDFDoc.cc:96
#4  0x00000000004c0fc3 in main (argc=<optimized out>, argv=<optimized out>) at pdfinfo.cc:119
(gdb) i r
rax            0x0	0
rbx            0x741ed0	7610064
rcx            0x3	3
rdx            0x3	3
rsi            0x4d9f24	5087012
rdi            0x7fffffffd764	140737488344932
rbp            0x1	0x1
rsp            0x7fffffffd710	0x7fffffffd710
r8             0x7fffffffd763	140737488344931
r9             0x0	0
r10            0x7ffff7243cc0	140737339735232
r11            0x0	0
r12            0x7fffffffd760	140737488344928
r13            0xfffffffffffffffc	-4
r14            0x741ea0	7610016
r15            0x741ed0	7610064
rip            0x4be249	0x4be249 <XRef::constructXRef()+857>
eflags         0x10202	[ IF RF ]
cs             0x33	51
ss             0x2b	43
ds             0x0	0
es             0x0	0
fs             0x0	0
gs             0x0	0
(gdb) 

It is not clear what the issue is here, but likely that num*sizeof/(XPDref) overflows?

I think this is in this 2004 advisory listed:

https://security.appspot.com/security/CESA-2004-007.txt

this would make it CVE-2004-0888 I think ;)