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Date: Fri, 11 Jan 2019 23:44:16 +0530
From: Dhiraj Mishra <>
Subject: NULL pointer dereference in lib60870 protocol

Hi List,

## Summary:
An issue was discovered in lib60870 2.1.1. LinkLayer_setAddress in
link_layer/link_layer.c has a NULL pointer dereference.

Snip code from link_layer.c#L142:
LinkLayer_setAddress(LinkLayer self, int address)
    self->address = address;
## BT:

==5832==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x55eb02eed6a2 bp 0x7ffc3b237e30 sp 0x7ffc3b237e20 T0)
==5832==The signal is caused by a READ memory access.
==5832==Hint: address points to the zero page.
    #0 0x55eb02eed6a1 in LinkLayer_setAddress
    #1 0x55eb02eeab30 in CS101_Master_setOwnAddress
    #2 0x55eb02ec4601 in main
    #3 0x7fb921c52b96 in __libc_start_main
    #4 0x55eb02ec40f9 in _start

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV
in LinkLayer_setAddress

Later CVE-2019-6137 was assigned to this.

Thank you

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