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Merge remote-tracking branch 'origin/topic/timw/generic-fuzzer'

Browse source 
* origin/topic/timw/generic-fuzzer:
  Move fuzzer corpus files to another directory
  Add a way to create generic fuzzers without creating new files
This commit is contained in:
Tim Wojtulewicz 2022-08-26 14:36:03 -07:00
commit d3e95c938f
16 changed files with 33 additions and 327 deletions
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6
CHANGES
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@ -1,3 +1,9 @@
5.1.0-dev.469 | 2022-08-26 14:36:03 -0700
* Move fuzzer corpus files to another directory (Tim Wojtulewicz, Corelight)
* Add a way to create generic fuzzers without creating new files (Tim Wojtulewicz, Corelight)
5.1.0-dev.466 | 2022-08-26 11:00:06 -0700
* Check for valid ip_hdr length before trying to make a Val out of it (Tim Wojtulewicz, Corelight)

2
VERSION
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@ -1 +1 @@
5.1.0-dev.466
5.1.0-dev.469

2
ci/test-fuzzers.sh
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@ -13,7 +13,7 @@ fuzzers=$(find ./src/fuzzers -name 'zeek-*-fuzzer')
for fuzzer_path in ${fuzzers}; do
fuzzer_exe=$(basename ${fuzzer_path})
fuzzer_name=$(echo ${fuzzer_exe} | sed 's/zeek-\(.*\)-fuzzer/\1/g')
corpus="../src/fuzzers/${fuzzer_name}-corpus.zip"
corpus="../src/fuzzers/corpora/${fuzzer_name}-corpus.zip"
if [[ -e ${corpus} ]]; then
echo "Fuzzer: ${fuzzer_exe} ${corpus}"

32
src/fuzzers/CMakeLists.txt
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@ -29,12 +29,8 @@ endif ()
# the shared lib, links it.
string(REGEX MATCH ".*\\.a$" _have_static_bind_lib "${BIND_LIBRARY}")
macro(ADD_FUZZ_TARGET _name)
set(_fuzz_target zeek-${_name}-fuzzer)
set(_fuzz_source ${_name}-fuzzer.cc)
macro(SETUP_FUZZ_TARGET _fuzz_target _fuzz_source)
add_executable(${_fuzz_target} ${_fuzz_source} ${ARGN})
target_link_libraries(${_fuzz_target} zeek_fuzzer_shared)
if ( _have_static_bind_lib )
@ -49,6 +45,19 @@ macro(ADD_FUZZ_TARGET _name)
target_link_libraries(${_fuzz_target}
$<TARGET_OBJECTS:zeek_fuzzer_standalone>)
endif ()
endmacro()
macro(ADD_FUZZ_TARGET _name)
set(_fuzz_target zeek-${_name}-fuzzer)
set(_fuzz_source ${_name}-fuzzer.cc)
setup_fuzz_target(${_fuzz_target} ${_fuzz_source})
endmacro ()
macro(ADD_GENERIC_ANALYZER_FUZZ_TARGET _name)
set(_fuzz_target zeek-${_name}-fuzzer)
set(_fuzz_source generic-analyzer-fuzzer.cc)
setup_fuzz_target(${_fuzz_target} ${_fuzz_source})
target_compile_definitions(${_fuzz_target} PUBLIC ZEEK_FUZZ_ANALYZER=${_name})
endmacro ()
include_directories(BEFORE ${CMAKE_CURRENT_SOURCE_DIR})
@ -78,10 +87,11 @@ target_link_libraries(zeek_fuzzer_shared
${zeek_fuzzer_shared_deps}
${CMAKE_THREAD_LIBS_INIT} ${CMAKE_DL_LIBS})
add_fuzz_target(dns)
add_fuzz_target(pop3)
add_fuzz_target(packet)
add_fuzz_target(http)
add_fuzz_target(imap)
add_fuzz_target(smtp)
add_fuzz_target(ftp)
add_fuzz_target(dns)
add_generic_analyzer_fuzz_target(ftp)
add_generic_analyzer_fuzz_target(http)
add_generic_analyzer_fuzz_target(imap)
add_generic_analyzer_fuzz_target(pop3)
add_generic_analyzer_fuzz_target(smtp)

0
src/fuzzers/dns-corpus.zip → src/fuzzers/corpora/dns-corpus.zip
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0
src/fuzzers/ftp-corpus.zip → src/fuzzers/corpora/ftp-corpus.zip
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0
src/fuzzers/http-corpus.zip → src/fuzzers/corpora/http-corpus.zip
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0
src/fuzzers/imap-corpus.zip → src/fuzzers/corpora/imap-corpus.zip
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0
src/fuzzers/packet-corpus.zip → src/fuzzers/corpora/packet-corpus.zip
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0
src/fuzzers/pop3-corpus.zip → src/fuzzers/corpora/pop3-corpus.zip
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0
src/fuzzers/smtp-corpus.zip → src/fuzzers/corpora/smtp-corpus.zip
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6
src/fuzzers/ftp-fuzzer.cc → src/fuzzers/generic-analyzer-fuzzer.cc
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@ -11,7 +11,9 @@
#include "zeek/packet_analysis/protocol/tcp/TCPSessionAdapter.h"
#include "zeek/session/Manager.h"
static constexpr auto ZEEK_FUZZ_ANALYZER = "ftp";
// Simple macros for converting a compiler define into a string.
#define VAL(str) #str
#define TOSTRING(str) VAL(str)
static zeek::Connection* add_connection()
{
@ -37,7 +39,7 @@ static zeek::analyzer::Analyzer* add_analyzer(zeek::Connection* conn)
{
auto* tcp = new zeek::packet_analysis::TCP::TCPSessionAdapter(conn);
auto* pia = new zeek::analyzer::pia::PIA_TCP(conn);
auto a = zeek::analyzer_mgr->InstantiateAnalyzer(ZEEK_FUZZ_ANALYZER, conn);
auto a = zeek::analyzer_mgr->InstantiateAnalyzer(TOSTRING(ZEEK_FUZZ_ANALYZER), conn);
tcp->AddChildAnalyzer(a);
tcp->AddChildAnalyzer(pia->AsAnalyzer());
conn->SetSessionAdapter(tcp, pia);

78
src/fuzzers/http-fuzzer.cc
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@ -1,78 +0,0 @@
#include <binpac.h>
#include "zeek/Conn.h"
#include "zeek/RunState.h"
#include "zeek/analyzer/Analyzer.h"
#include "zeek/analyzer/Manager.h"
#include "zeek/analyzer/protocol/pia/PIA.h"
#include "zeek/analyzer/protocol/tcp/TCP.h"
#include "zeek/fuzzers/FuzzBuffer.h"
#include "zeek/fuzzers/fuzzer-setup.h"
#include "zeek/packet_analysis/protocol/tcp/TCPSessionAdapter.h"
#include "zeek/session/Manager.h"
static constexpr auto ZEEK_FUZZ_ANALYZER = "http";
static zeek::Connection* add_connection()
{
static constexpr double network_time_start = 1439471031;
zeek::run_state::detail::update_network_time(network_time_start);
zeek::Packet p;
zeek::ConnTuple conn_id;
conn_id.src_addr = zeek::IPAddr("1.2.3.4");
conn_id.dst_addr = zeek::IPAddr("5.6.7.8");
conn_id.src_port = htons(23132);
conn_id.dst_port = htons(80);
conn_id.is_one_way = false;
conn_id.proto = TRANSPORT_TCP;
zeek::detail::ConnKey key(conn_id);
zeek::Connection* conn = new zeek::Connection(key, network_time_start, &conn_id, 1, &p);
conn->SetTransport(TRANSPORT_TCP);
zeek::session_mgr->Insert(conn);
return conn;
}
static zeek::analyzer::Analyzer* add_analyzer(zeek::Connection* conn)
{
auto* tcp = new zeek::packet_analysis::TCP::TCPSessionAdapter(conn);
auto* pia = new zeek::analyzer::pia::PIA_TCP(conn);
auto a = zeek::analyzer_mgr->InstantiateAnalyzer(ZEEK_FUZZ_ANALYZER, conn);
tcp->AddChildAnalyzer(a);
tcp->AddChildAnalyzer(pia->AsAnalyzer());
conn->SetSessionAdapter(tcp, pia);
return a;
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
zeek::detail::FuzzBuffer fb{data, size};
if ( ! fb.Valid() )
return 0;
auto conn = add_connection();
auto a = add_analyzer(conn);
for ( ;; )
{
auto chunk = fb.Next();
if ( ! chunk )
break;
try
{
a->ForwardStream(chunk->size, chunk->data.get(), chunk->is_orig);
}
catch ( const binpac::Exception& e )
{
}
chunk = {};
zeek::event_mgr.Drain();
}
zeek::detail::fuzzer_cleanup_one_input();
return 0;
}

78
src/fuzzers/imap-fuzzer.cc
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@ -1,78 +0,0 @@
#include <binpac.h>
#include "zeek/Conn.h"
#include "zeek/RunState.h"
#include "zeek/analyzer/Analyzer.h"
#include "zeek/analyzer/Manager.h"
#include "zeek/analyzer/protocol/pia/PIA.h"
#include "zeek/analyzer/protocol/tcp/TCP.h"
#include "zeek/fuzzers/FuzzBuffer.h"
#include "zeek/fuzzers/fuzzer-setup.h"
#include "zeek/packet_analysis/protocol/tcp/TCPSessionAdapter.h"
#include "zeek/session/Manager.h"
static constexpr auto ZEEK_FUZZ_ANALYZER = "imap";
static zeek::Connection* add_connection()
{
static constexpr double network_time_start = 1439471031;
zeek::run_state::detail::update_network_time(network_time_start);
zeek::Packet p;
zeek::ConnTuple conn_id;
conn_id.src_addr = zeek::IPAddr("1.2.3.4");
conn_id.dst_addr = zeek::IPAddr("5.6.7.8");
conn_id.src_port = htons(23132);
conn_id.dst_port = htons(80);
conn_id.is_one_way = false;
conn_id.proto = TRANSPORT_TCP;
zeek::detail::ConnKey key(conn_id);
zeek::Connection* conn = new zeek::Connection(key, network_time_start, &conn_id, 1, &p);
conn->SetTransport(TRANSPORT_TCP);
zeek::session_mgr->Insert(conn);
return conn;
}
static zeek::analyzer::Analyzer* add_analyzer(zeek::Connection* conn)
{
auto* tcp = new zeek::packet_analysis::TCP::TCPSessionAdapter(conn);
auto* pia = new zeek::analyzer::pia::PIA_TCP(conn);
auto a = zeek::analyzer_mgr->InstantiateAnalyzer(ZEEK_FUZZ_ANALYZER, conn);
tcp->AddChildAnalyzer(a);
tcp->AddChildAnalyzer(pia->AsAnalyzer());
conn->SetSessionAdapter(tcp, pia);
return a;
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
zeek::detail::FuzzBuffer fb{data, size};
if ( ! fb.Valid() )
return 0;
auto conn = add_connection();
auto a = add_analyzer(conn);
for ( ;; )
{
auto chunk = fb.Next();
if ( ! chunk )
break;
try
{
a->ForwardStream(chunk->size, chunk->data.get(), chunk->is_orig);
}
catch ( const binpac::Exception& e )
{
}
chunk = {};
zeek::event_mgr.Drain();
}
zeek::detail::fuzzer_cleanup_one_input();
return 0;
}

78
src/fuzzers/pop3-fuzzer.cc
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@ -1,78 +0,0 @@
#include <binpac.h>
#include "zeek/Conn.h"
#include "zeek/RunState.h"
#include "zeek/analyzer/Analyzer.h"
#include "zeek/analyzer/Manager.h"
#include "zeek/analyzer/protocol/pia/PIA.h"
#include "zeek/analyzer/protocol/tcp/TCP.h"
#include "zeek/fuzzers/FuzzBuffer.h"
#include "zeek/fuzzers/fuzzer-setup.h"
#include "zeek/packet_analysis/protocol/tcp/TCPSessionAdapter.h"
#include "zeek/session/Manager.h"
static constexpr auto ZEEK_FUZZ_ANALYZER = "pop3";
static zeek::Connection* add_connection()
{
static constexpr double network_time_start = 1439471031;
zeek::run_state::detail::update_network_time(network_time_start);
zeek::Packet p;
zeek::ConnTuple conn_id;
conn_id.src_addr = zeek::IPAddr("1.2.3.4");
conn_id.dst_addr = zeek::IPAddr("5.6.7.8");
conn_id.src_port = htons(23132);
conn_id.dst_port = htons(80);
conn_id.is_one_way = false;
conn_id.proto = TRANSPORT_TCP;
zeek::detail::ConnKey key(conn_id);
zeek::Connection* conn = new zeek::Connection(key, network_time_start, &conn_id, 1, &p);
conn->SetTransport(TRANSPORT_TCP);
zeek::session_mgr->Insert(conn);
return conn;
}
static zeek::analyzer::Analyzer* add_analyzer(zeek::Connection* conn)
{
auto* tcp = new zeek::packet_analysis::TCP::TCPSessionAdapter(conn);
auto* pia = new zeek::analyzer::pia::PIA_TCP(conn);
auto a = zeek::analyzer_mgr->InstantiateAnalyzer(ZEEK_FUZZ_ANALYZER, conn);
tcp->AddChildAnalyzer(a);
tcp->AddChildAnalyzer(pia->AsAnalyzer());
conn->SetSessionAdapter(tcp, pia);
return a;
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
zeek::detail::FuzzBuffer fb{data, size};
if ( ! fb.Valid() )
return 0;
auto conn = add_connection();
auto a = add_analyzer(conn);
for ( ;; )
{
auto chunk = fb.Next();
if ( ! chunk )
break;
try
{
a->ForwardStream(chunk->size, chunk->data.get(), chunk->is_orig);
}
catch ( const binpac::Exception& e )
{
}
chunk = {};
zeek::event_mgr.Drain();
}
zeek::detail::fuzzer_cleanup_one_input();
return 0;
}

78
src/fuzzers/smtp-fuzzer.cc
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@ -1,78 +0,0 @@
#include <binpac.h>
#include "zeek/Conn.h"
#include "zeek/RunState.h"
#include "zeek/analyzer/Analyzer.h"
#include "zeek/analyzer/Manager.h"
#include "zeek/analyzer/protocol/pia/PIA.h"
#include "zeek/analyzer/protocol/tcp/TCP.h"
#include "zeek/fuzzers/FuzzBuffer.h"
#include "zeek/fuzzers/fuzzer-setup.h"
#include "zeek/packet_analysis/protocol/tcp/TCPSessionAdapter.h"
#include "zeek/session/Manager.h"
static constexpr auto ZEEK_FUZZ_ANALYZER = "smtp";
static zeek::Connection* add_connection()
{
static constexpr double network_time_start = 1439471031;
zeek::run_state::detail::update_network_time(network_time_start);
zeek::Packet p;
zeek::ConnTuple conn_id;
conn_id.src_addr = zeek::IPAddr("1.2.3.4");
conn_id.dst_addr = zeek::IPAddr("5.6.7.8");
conn_id.src_port = htons(23132);
conn_id.dst_port = htons(80);
conn_id.is_one_way = false;
conn_id.proto = TRANSPORT_TCP;
zeek::detail::ConnKey key(conn_id);
zeek::Connection* conn = new zeek::Connection(key, network_time_start, &conn_id, 1, &p);
conn->SetTransport(TRANSPORT_TCP);
zeek::session_mgr->Insert(conn);
return conn;
}
static zeek::analyzer::Analyzer* add_analyzer(zeek::Connection* conn)
{
auto* tcp = new zeek::packet_analysis::TCP::TCPSessionAdapter(conn);
auto* pia = new zeek::analyzer::pia::PIA_TCP(conn);
auto a = zeek::analyzer_mgr->InstantiateAnalyzer(ZEEK_FUZZ_ANALYZER, conn);
tcp->AddChildAnalyzer(a);
tcp->AddChildAnalyzer(pia->AsAnalyzer());
conn->SetSessionAdapter(tcp, pia);
return a;
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
zeek::detail::FuzzBuffer fb{data, size};
if ( ! fb.Valid() )
return 0;
auto conn = add_connection();
auto a = add_analyzer(conn);
for ( ;; )
{
auto chunk = fb.Next();
if ( ! chunk )
break;
try
{
a->ForwardStream(chunk->size, chunk->data.get(), chunk->is_orig);
}
catch ( const binpac::Exception& e )
{
}
chunk = {};
zeek::event_mgr.Drain();
}
zeek::detail::fuzzer_cleanup_one_input();
return 0;
}