31 lines
No EOL
1.4 KiB
Text
31 lines
No EOL
1.4 KiB
Text
Sample generated by AFL
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Build Information:
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TShark 1.12.9 (v1.12.9-0-gfadb421 from (HEAD)
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Copyright 1998-2015 Gerald Combs <gerald@wireshark.org> and contributors.
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This is free software; see the source for copying conditions. There is NO
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warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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Compiled (64-bit) with GLib 2.48.1, with libpcap, with libz 1.2.8, with POSIX
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capabilities (Linux), with libnl 3, without SMI, with c-ares 1.11.0, without
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Lua, without Python, with GnuTLS 3.4.13, with Gcrypt 1.7.1, with MIT Kerberos,
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with GeoIP.
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Running on Linux 4.6.2-1-ARCH, with locale en_US.utf8, with libpcap version
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1.7.4, with libz 1.2.8.
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Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz
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--
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This issue was uncovered with AFL (http://lcamtuf.coredump.cx/afl/)
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The attached sample evokes a divide-by-zero error in the dissect_pbb_tlvblock() function at packet-packetbb.c:289.
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The variable of interest seems to be 'c' which is set at packet-packetbb.c:285 using two other variables and an addition. When c is zero, the expression "length/c" at packet-packetbb.c:289 results in a divide-by-zero error.
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Divide-by-zero has been observed when sample is parsed by tshark versions 1.12.8, 1.12.9, 1.12.10, 1.12.12, and 2.0.4 among others.
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Credit goes to Chris Benedict, Aurelien Delaitre, NIST SAMATE Project, https://samate.nist.gov
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Proof of Concept:
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https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/40197.zip |