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: p...@hermes.cam.ac.uk
Reporter: fumfi....@gmail.com
CC: pcre-dev@exim.org
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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