| Bug ID |
12576
|
| Summary |
Attempted use of uninitialized pointer in dissect_nds_request
|
| Product |
Wireshark
|
| Version |
unspecified
|
| Hardware |
x86
|
| OS |
All
|
| Status |
UNCONFIRMED
|
| Severity |
Major
|
| Priority |
Low
|
| Component |
Dissection engine (libwireshark)
|
| Assignee |
[email protected]
|
| Reporter |
[email protected]
|
Created attachment 14695 [details]
Sample generated with AFL
Build Information:
TShark 1.12.9 (v1.12.9-0-gfadb421 from (HEAD)
Copyright 1998-2015 Gerald Combs <[email protected]> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Compiled (64-bit) with GLib 2.48.1, with libpcap, with libz 1.2.8, with POSIX
capabilities (Linux), with libnl 3, without SMI, with c-ares 1.11.0, without
Lua, without Python, with GnuTLS 3.4.13, with Gcrypt 1.7.1, with MIT Kerberos,
with GeoIP.
Running on Linux 4.6.2-1-ARCH, with locale en_US.utf8, with libpcap version
1.7.4, with libz 1.2.8.
Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz
Built using clang 4.2.1 Compatible Clang 3.8.0 (tags/RELEASE_380/final).
--
This issue was uncovered with AFL (http://lcamtuf.coredump.cx/afl/)
There is a bug in dissect_nds_request located in
epan/dissectors/packet-ncp2222.inc.
dissect_nds_request attempts to call ptvcursor_free() near
packet-ncp2222.inc:11806 using the variable ptvc that is set to null at the
start of dissect_nds_request. Using the attached sample, the only place ptvc
could be set (~ncp2222.inc:11618) is never executed and thus ptvc remains a
null pointer.
Credit goes to Chris Benedict, Aurelien Delaitre, NIST SAMATE Project,
https://samate.nist.gov
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