[pcre-dev] [Bug 2109] New: Null pointer dereference in pcre…

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Temat: [pcre-dev] [Bug 2109] New: Null pointer dereference in pcre2_printint_8()
https://bugs.exim.org/show_bug.cgi?id=2109

            Bug ID: 2109
           Summary: Null pointer dereference in pcre2_printint_8()
           Product: PCRE
           Version: 10.23 (PCRE2)
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: bug
          Priority: medium
         Component: Code
          Assignee: ph10@???
          Reporter: fumfi.255@???
                CC: pcre-dev@???


Created attachment 1016
--> https://bugs.exim.org/attachment.cgi?id=1016&action=edit
POC to trigger null pointer dereference (pcre2test)

Affected:
- PCRE2 version 10.23 (SVN rev: 760)

To reproduce the problem (pcre2test):
pcre2test pcre2_null_ptr_pcre2_printint_8 /dev/null

ASAN:

==845==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000080 (pc
0x000000504297 bp 0x7fffdd94a8b0 sp 0x7fffdd94a540 T0)
==845==The signal is caused by a READ memory access.
==845==Hint: address points to the zero page.
    #0 0x504296 in pcre2_printint_8 XYZ/pcre/./src/pcre2_printint.c:311:23
    #1 0x504296 in show_pattern_info XYZ/pcre/src/pcre2test.c:4067
    #2 0x4ede1d in process_command XYZ/pcre/src/pcre2test.c:4564:10
    #3 0x4ede1d in main XYZ/pcre/src/pcre2test.c:8058
    #4 0x7f9057df582f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
    #5 0x41acd8 in _start (/usr/local/bin/pcre2test+0x41acd8)


AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV XYZ/pcre/./src/pcre2_printint.c:311:23 in
pcre2_printint_8
==845==ABORTING

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