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610 Commits

Author SHA1 Message Date
Jeroen Ketema
9f4e261625 Set precision of cpp/open-call-with-mode-argument to high 2022-02-04 10:01:25 +01:00
Jeroen Ketema
ef2a70e00c Limit open/openat target to global/std scope 2022-02-04 09:51:10 +01:00
Geoffrey White
8031c3f699 Merge branch 'main' into clrtxt9 2022-02-03 17:01:59 +00:00
Geoffrey White
02b1774d7f C++: Switch from GVN to localFlow. 2022-02-03 16:00:26 +00:00
Jeroen Ketema
0b9b6d7b98 Address review comments 2022-02-03 12:09:18 +01:00
Jeroen Ketema
4d03082f16 Ensure that O_CREAT and O_TMPFILE are unique 2022-02-03 11:24:20 +01:00
Jeroen Ketema
5a2ce225f4 Check that all bits are set when checking for a flag 
The `O_...` macro definitions somtimes set multiple bits, while
the bits individually represent the values of different `O_...`
macros. This lead to false postives on codebases built against
Musl libc, which defines `O_TMPFILE` as `020200000` and
`O_DIRECTORY` as `0200000`.
 2022-02-03 10:29:13 +01:00
Geoffrey White
708da8cd62 C++: Increase the query precision to 'high'. 2022-02-02 18:03:25 +00:00
Geoffrey White
4048ba0a1c C++: Fix false positives around terminal output. 2022-02-02 17:59:28 +00:00
Geoffrey White
39a2ffd438 C++: Fix false positives around 'stdin'. 2022-02-02 17:39:14 +00:00
Jeroen Ketema
aa4651312e Fix naming conflicts in cpp/world-writable-file-creation 2022-02-02 17:36:14 +01:00
Jeroen Ketema
f32500306a Address review comments 2022-02-02 17:24:55 +01:00
Jeroen Ketema
0773ab37a5 Use matches to check for 0x prefix 2022-02-02 15:26:46 +01:00
Jeroen Ketema
92d9e51d2a Extract the value of O_CREAT and O_TMPFILE from the defining macro 
There are operating systems that define `O_CREAT` with a different
value than Linux, which uses `0x40`. For example, OpenBSD uses `0x0200`.
Hence, we cannot use a hardcoded value.

Also handle `O_TMPFILE` while here.
 2022-02-02 15:16:26 +01:00
Mathias Vorreiter Pedersen
1aa32b09be Merge pull request #7802 from geoffw0/clrtxt8 
C++: Recognize password struct fields.
 2022-02-02 14:10:40 +00:00
Jeroen Ketema
bd859d99bf Address review comments 2022-02-02 10:09:47 +01:00
Jeroen Ketema
ff1c971100 Add query for missing mode argument in open/openat calls 2022-02-01 14:52:22 +01:00
Jeroen Ketema
dbac927721 Take into account that the 4th argument of openat may be omitted 
This matches what is done for `open`.
 2022-02-01 11:41:07 +01:00
Mathias Vorreiter Pedersen
bb2feda8fb Merge pull request #7703 from geoffw0/getslocal 2022-01-28 19:35:15 +00:00
Geoffrey White
8a1b49f816 C++: Recognize password struct fields. 2022-01-28 19:10:46 +00:00
Geoffrey White
036e1495b8 Merge branch 'main' into getslocal 2022-01-28 15:58:13 +00:00
Geoffrey White
b73dc98191 C++: Exclude write to stdout etc. 2022-01-28 11:57:31 +00:00
Mathias Vorreiter Pedersen
b3f4357dc8 Merge pull request #7742 from geoffw0/clrtxt6 
C++: Upgrade cpp/cleartext-storage-buffer
 2022-01-27 14:40:40 +00:00
Geoffrey White
2e1b09fd75 C++: Modernize flow sources. 2022-01-27 13:19:09 +00:00
Geoffrey White
1bf9c19638 C++: Autoformat. 2022-01-27 11:26:18 +00:00
Geoffrey White
d9a2347178 C++: Switch back to IR taint. 2022-01-27 10:50:22 +00:00
Geoffrey White
340b40e8f3 C++: Modernize cpp/cleartext-storage-buffer. 2022-01-25 13:54:42 +00:00
Geoffrey White
764f27f08e C++: Upgrade to path-problem. 2022-01-24 18:32:05 +00:00
Geoffrey White
11929378c7 C++: Upgrade cpp/cleartext-storage-file to full taint flow. 2022-01-24 17:48:45 +00:00
Geoffrey White
588447d596 C++: Fix up isParameterDeref. 2022-01-24 11:06:24 +00:00
Geoffrey White
0b98397e9b C++: Catch another encryption clue. 2022-01-21 16:16:16 +00:00
Erik Krogh Kristensen
a77b2b0209 Merge pull request #7668 from erik-krogh/simplify-casts 
simplify expressions that could be type-casts
 2022-01-20 15:20:18 +01:00
Geoffrey White
b230681bc8 Merge pull request #7650 from geoffw0/clrtxt3 
C++: Improve cpp/cleartext-transmission
 2022-01-20 13:21:54 +00:00
Geoffrey White
8bdbaf4b57 C++: Autoformat. 2022-01-20 09:52:24 +00:00
Erik Krogh Kristensen
4e8e3a7420 simplify expressions that could be type-casts 2022-01-20 10:41:35 +01:00
Geoffrey White
9c2d961ae5 C++: Fix another expression of stdin / stdout we see in practice. 2022-01-19 13:00:34 +00:00
Geoffrey White
d77ba020f9 C++: Support more routines as proof-of-encryption in cpp/cleartext-transmission. 2022-01-19 12:40:32 +00:00
Geoffrey White
d475101286 C++: Fix some code duplication. 2022-01-17 16:26:22 +00:00
Andrew Eisenberg
fbb5d7196f Merge branch 'main' into post-release-prep/codeql-cli-2.7.5 2022-01-14 08:23:43 -08:00
Paolo Tranquilli
64d15d6226 C++: fix inc.qhelp files and change notes 2022-01-13 11:59:48 +00:00
Paolo Tranquilli
7b4300e4cf C++: Apply suggestions in documentation 
Co-authored-by: Sarah Edwards <skedwards88@github.com>
 2022-01-13 11:59:48 +00:00
Paolo Tranquilli
9d49ad9f20 C++: use includes in OverrunWrite qhelp files 
Also added the relevant CERT C _and_ C++ standard references where they
were missing, and did some minor stylistic tweaks to
`OverrunWriteFloat.qhelp`.
 2022-01-13 11:59:48 +00:00
Paolo Tranquilli
aac029841a C++: doc fixes to VeryLikelyOverrunWrite 2022-01-13 11:59:47 +00:00
Paolo Tranquilli
1e4861a944 C++: shorten VeryLikelyOverrunWrite @name 2022-01-13 11:59:47 +00:00
Paolo Tranquilli
106400238a C++: tweak overrunning write qhelp files 2022-01-13 11:59:47 +00:00
Paolo Tranquilli
97f1a5bac0 C++: add VeryLikelyOverrunWrite.qhelp 2022-01-13 11:59:47 +00:00
Paolo Tranquilli
10b62154a1 C++: add cpp/very-likely-overruning-write help 
Also update the help of `cpp/overruning-write`, as the case shown there
will actually not be flagged by that query any more.
 2022-01-13 11:59:47 +00:00
Paolo Tranquilli
b979f02e5d C++: fix OverrunWrite for backward compatibility 
Rather than testing for `TypeBoundsAnalysis`, we test that the reason is
not `ValueFlowAnalysis` (which is reported by the new
`cpp/very-likely-overruning-write` query), so that if a client has
overridden `BufferWrite::getMaxData` the `NoSpecifiedEstimateReason` is
taken into account.
 2022-01-13 11:59:47 +00:00
Paolo Tranquilli
a0059202db C++: split cpp/overrunning-write into two 
This splits the `cpp/overruning-write` into two separate queries based
off on the reason for the estimation. If the overrun is detected based
on non-trivial range analysis, the results are now marked by the new
`cpp/very-likely-overruning-write` high precision query. If it is based
on less precise, usually type based bounds, then it will still be marked
by `cpp/overruning-write` which remains at medium precision.
 2022-01-13 11:59:47 +00:00
Mathias Vorreiter Pedersen
2a02ce137a C++: Fix join orders in 'exprIsSubLeftOrLess'. 
Before:

Tuple counts for UnsignedDifferenceExpressionComparedZero::exprIsSubLeftOrLess#ff/2@i3#a5071w3a after 24s:
  304220    ~2%      {2} r1 = JOIN UnsignedDifferenceExpressionComparedZero::exprIsSubLeftOrLess#ff#prev_delta WITH Expr::BinaryOperation#class#f#join_rhs ON FIRST 1 OUTPUT Lhs.1, Rhs.0 'sub'

  190061335 ~24%     {2} r2 = JOIN r1 WITH DataFlowUtil::localFlowStep#ff ON FIRST 1 OUTPUT Lhs.1 'sub', Rhs.1 'n'

  3956      ~0%      {2} r3 = JOIN r1 WITH DataFlowUtil::localFlowStep#ff_10#join_rhs ON FIRST 1 OUTPUT Lhs.1 'sub', Rhs.1 'n'

  407983    ~1%      {2} r4 = JOIN Expr::BinaryOperation#class#f#join_rhs WITH UnsignedDifferenceExpressionComparedZero::exprIsSubLeftOrLess#ff#prev ON FIRST 1 OUTPUT Rhs.1 'n', Lhs.0 'sub'
  380823    ~0%      {2} r5 = JOIN r4 WITH DataFlowUtil::TExprNode#ff_10#join_rhs ON FIRST 1 OUTPUT Lhs.1 'sub', Rhs.1
  0         ~0%      {2} r6 = JOIN r5 WITH UnsignedDifferenceExpressionComparedZero::isGuarded#fff#prev_delta ON FIRST 2 OUTPUT Rhs.2, Lhs.0 'sub'
  0         ~0%      {2} r7 = JOIN r6 WITH DataFlowUtil::TExprNode#ff ON FIRST 1 OUTPUT Lhs.1 'sub', Rhs.1 'n'

  3956      ~0%      {2} r8 = r3 UNION r7
  190065291 ~24%     {2} r9 = r2 UNION r8
  ...

After:

Tuple counts for UnsignedDifferenceExpressionComparedZero::interestingSubExpr#f/1@654e29g3 after 228ms:
  370 ~2%     {2} r1 = ComparisonOperation::RelationalOperation::getGreaterOperand_dispred#fb AND NOT Exclusions::isFromMacroDefinition#b(Lhs.1 'sub')
  370 ~0%     {2} r2 = SCAN r1 OUTPUT In.1 'sub', In.0
  370 ~3%     {3} r3 = JOIN r2 WITH Expr::Expr::getFullyConverted_dispred#ff ON FIRST 1 OUTPUT Rhs.1, Lhs.1, Lhs.0 'sub'
  210 ~1%     {2} r4 = JOIN r3 WITH SimpleRangeAnalysis::SimpleRangeAnalysisCached::exprMightOverflowNegatively#f ON FIRST 1 OUTPUT Lhs.2 'sub', Lhs.1
  210 ~0%     {3} r5 = JOIN r4 WITH Expr::Expr::getFullyConverted_dispred#ff ON FIRST 1 OUTPUT Lhs.1, Lhs.0 'sub', Rhs.1
  210 ~1%     {3} r6 = JOIN r5 WITH ComparisonOperation::RelationalOperation::getLesserOperand_dispred#ff ON FIRST 1 OUTPUT Rhs.1, Lhs.1 'sub', Lhs.2
  59  ~2%     {4} r7 = JOIN r6 WITH Expr::Expr::getValue_dispred#ff ON FIRST 1 OUTPUT Lhs.1 'sub', Lhs.2, Rhs.1, toInt(Rhs.1)
  17  ~0%     {4} r8 = SELECT r7 ON In.3 = 0
  17  ~0%     {2} r9 = SCAN r8 OUTPUT In.1, In.0 'sub'
  8   ~0%     {2} r10 = JOIN r9 WITH Expr::Expr::getUnspecifiedType_dispred#bb ON FIRST 1 OUTPUT Rhs.1, Lhs.1 'sub'
  8   ~0%     {1} r11 = JOIN r10 WITH Type::IntegralType::isUnsigned_dispred#f ON FIRST 1 OUTPUT Lhs.1 'sub'
              return r11

Tuple counts for UnsignedDifferenceExpressionComparedZero::exprIsSubLeftOrLess#ff/2@i2#61800weu after 1ms:
  8  ~0%      {2} r1 = JOIN UnsignedDifferenceExpressionComparedZero::exprIsSubLeftOrLess#ff#prev_delta WITH UnsignedDifferenceExpressionComparedZero::interestingSubExpr#f ON FIRST 1 OUTPUT Lhs.1, Lhs.0 'sub'

  0  ~0%      {2} r2 = JOIN r1 WITH DataFlowUtil::localFlowStep#ff ON FIRST 1 OUTPUT Lhs.1 'sub', Rhs.1 'n'

  1  ~0%      {2} r3 = JOIN r1 WITH DataFlowUtil::localFlowStep#ff_10#join_rhs ON FIRST 1 OUTPUT Lhs.1 'sub', Rhs.1 'n'

  0  ~0%      {3} r4 = JOIN UnsignedDifferenceExpressionComparedZero::isGuarded#fff#prev_delta WITH UnsignedDifferenceExpressionComparedZero::interestingSubExpr#f ON FIRST 1 OUTPUT Lhs.1, Lhs.0 'sub', Lhs.2
  0  ~0%      {3} r5 = JOIN r4 WITH DataFlowUtil::TExprNode#ff ON FIRST 1 OUTPUT Lhs.1 'sub', Rhs.1 'n', Lhs.2
  0  ~0%      {2} r6 = JOIN r5 WITH UnsignedDifferenceExpressionComparedZero::exprIsSubLeftOrLess#ff#prev ON FIRST 2 OUTPUT Lhs.2, Lhs.0 'sub'
  0  ~0%      {2} r7 = JOIN r6 WITH DataFlowUtil::TExprNode#ff ON FIRST 1 OUTPUT Lhs.1 'sub', Rhs.1 'n'

  1  ~0%      {2} r8 = r3 UNION r7
  1  ~0%      {2} r9 = r2 UNION r8
  ...
 2022-01-10 17:28:14 +00:00