Public bug reported:
Pcre library overflows in:
in (pcre_compile.c:2180:register int c = *code;) c i assigned to a value
in [0-255].
in (pcre_compile.c:2239:code += PRIV(OP_lengths)[c];) the array is
accessed via c, value.
This array is initialized using define OP_LENGTHS in
(pcre_internal.h:1854) with 155 entries.
pcre_tables.c:59:const pcre_uint8 PRIV(OP_lengths)[] = { OP_LENGTHS };
Executing a test, matching a regullar expression, sometimes, it enters
an infinit loop, in find_recurse.
Due to return value of PRIV(OP_lengths)[c] == 0, having c outside the
size of the array.
I'll further add a simple application to reproduce.
Can, any one familliar with pcre3 library clarify if this overflow is a real
issue !?
Thanks!
** Affects: pcre3 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1414639
Title:
Non deterministic infinite loops in find_recursive, 1:8.31-2ubuntu2
Status in pcre3 package in Ubuntu:
New
Bug description:
Pcre library overflows in:
in (pcre_compile.c:2180:register int c = *code;) c i assigned to a
value in [0-255].
in (pcre_compile.c:2239:code += PRIV(OP_lengths)[c];) the array is
accessed via c, value.
This array is initialized using define OP_LENGTHS in
(pcre_internal.h:1854) with 155 entries.
pcre_tables.c:59:const pcre_uint8 PRIV(OP_lengths)[] = { OP_LENGTHS };
Executing a test, matching a regullar expression, sometimes, it enters
an infinit loop, in find_recurse.
Due to return value of PRIV(OP_lengths)[c] == 0, having c outside the
size of the array.
I'll further add a simple application to reproduce.
Can, any one familliar with pcre3 library clarify if this overflow is a real
issue !?
Thanks!
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