From 02dfcda54a56e42d96a2f7ad2448654435e7c850 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Andr=C3=A9=20Hentschel?= Date: Sat, 11 Apr 2020 15:36:16 +0200 Subject: [PATCH] package/p7zip: fix CVE-2018-5996 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Signed-off-by: André Hentschel Signed-off-by: Thomas Petazzoni --- package/p7zip/0003-CVE-2018-5996.patch | 223 +++++++++++++++++++++++++ package/p7zip/p7zip.mk | 2 + 2 files changed, 225 insertions(+) create mode 100644 package/p7zip/0003-CVE-2018-5996.patch diff --git a/package/p7zip/0003-CVE-2018-5996.patch b/package/p7zip/0003-CVE-2018-5996.patch new file mode 100644 index 0000000000..dc3e90ad3a --- /dev/null +++ b/package/p7zip/0003-CVE-2018-5996.patch @@ -0,0 +1,223 @@ +From: Robert Luberda +Date: Sun, 28 Jan 2018 23:47:40 +0100 +Subject: CVE-2018-5996 + +Hopefully fix Memory Corruptions via RAR PPMd (CVE-2018-5996) by +applying a few changes from 7Zip 18.00-beta. + +Bug-Debian: https://bugs.debian.org/#888314 + +Signed-off-by: André Hentschel +--- + CPP/7zip/Compress/Rar1Decoder.cpp | 13 +++++++++---- + CPP/7zip/Compress/Rar1Decoder.h | 1 + + CPP/7zip/Compress/Rar2Decoder.cpp | 10 +++++++++- + CPP/7zip/Compress/Rar2Decoder.h | 1 + + CPP/7zip/Compress/Rar3Decoder.cpp | 23 ++++++++++++++++++++--- + CPP/7zip/Compress/Rar3Decoder.h | 2 ++ + 6 files changed, 42 insertions(+), 8 deletions(-) + +diff --git a/CPP/7zip/Compress/Rar1Decoder.cpp b/CPP/7zip/Compress/Rar1Decoder.cpp +index 1aaedcc..68030c7 100644 +--- a/CPP/7zip/Compress/Rar1Decoder.cpp ++++ b/CPP/7zip/Compress/Rar1Decoder.cpp +@@ -29,7 +29,7 @@ public: + }; + */ + +-CDecoder::CDecoder(): m_IsSolid(false) { } ++CDecoder::CDecoder(): m_IsSolid(false), _errorMode(false) { } + + void CDecoder::InitStructures() + { +@@ -406,9 +406,14 @@ HRESULT CDecoder::CodeReal(ISequentialInStream *inStream, ISequentialOutStream * + InitData(); + if (!m_IsSolid) + { ++ _errorMode = false; + InitStructures(); + InitHuff(); + } ++ ++ if (_errorMode) ++ return S_FALSE; ++ + if (m_UnpackSize > 0) + { + GetFlagsBuf(); +@@ -477,9 +482,9 @@ STDMETHODIMP CDecoder::Code(ISequentialInStream *inStream, ISequentialOutStream + const UInt64 *inSize, const UInt64 *outSize, ICompressProgressInfo *progress) + { + try { return CodeReal(inStream, outStream, inSize, outSize, progress); } +- catch(const CInBufferException &e) { return e.ErrorCode; } +- catch(const CLzOutWindowException &e) { return e.ErrorCode; } +- catch(...) { return S_FALSE; } ++ catch(const CInBufferException &e) { _errorMode = true; return e.ErrorCode; } ++ catch(const CLzOutWindowException &e) { _errorMode = true; return e.ErrorCode; } ++ catch(...) { _errorMode = true; return S_FALSE; } + } + + STDMETHODIMP CDecoder::SetDecoderProperties2(const Byte *data, UInt32 size) +diff --git a/CPP/7zip/Compress/Rar1Decoder.h b/CPP/7zip/Compress/Rar1Decoder.h +index 630f089..01b606b 100644 +--- a/CPP/7zip/Compress/Rar1Decoder.h ++++ b/CPP/7zip/Compress/Rar1Decoder.h +@@ -39,6 +39,7 @@ public: + + Int64 m_UnpackSize; + bool m_IsSolid; ++ bool _errorMode; + + UInt32 ReadBits(int numBits); + HRESULT CopyBlock(UInt32 distance, UInt32 len); +diff --git a/CPP/7zip/Compress/Rar2Decoder.cpp b/CPP/7zip/Compress/Rar2Decoder.cpp +index b3f2b4b..0580c8d 100644 +--- a/CPP/7zip/Compress/Rar2Decoder.cpp ++++ b/CPP/7zip/Compress/Rar2Decoder.cpp +@@ -80,7 +80,8 @@ static const UInt32 kHistorySize = 1 << 20; + static const UInt32 kWindowReservSize = (1 << 22) + 256; + + CDecoder::CDecoder(): +- m_IsSolid(false) ++ m_IsSolid(false), ++ m_TablesOK(false) + { + } + +@@ -100,6 +101,8 @@ UInt32 CDecoder::ReadBits(unsigned numBits) { return m_InBitStream.ReadBits(numB + + bool CDecoder::ReadTables(void) + { ++ m_TablesOK = false; ++ + Byte levelLevels[kLevelTableSize]; + Byte newLevels[kMaxTableSize]; + m_AudioMode = (ReadBits(1) == 1); +@@ -170,6 +173,8 @@ bool CDecoder::ReadTables(void) + } + + memcpy(m_LastLevels, newLevels, kMaxTableSize); ++ m_TablesOK = true; ++ + return true; + } + +@@ -344,6 +349,9 @@ HRESULT CDecoder::CodeReal(ISequentialInStream *inStream, ISequentialOutStream * + return S_FALSE; + } + ++ if (!m_TablesOK) ++ return S_FALSE; ++ + UInt64 startPos = m_OutWindowStream.GetProcessedSize(); + while (pos < unPackSize) + { +diff --git a/CPP/7zip/Compress/Rar2Decoder.h b/CPP/7zip/Compress/Rar2Decoder.h +index 3a0535c..0e9005f 100644 +--- a/CPP/7zip/Compress/Rar2Decoder.h ++++ b/CPP/7zip/Compress/Rar2Decoder.h +@@ -139,6 +139,7 @@ class CDecoder : + + UInt64 m_PackSize; + bool m_IsSolid; ++ bool m_TablesOK; + + void InitStructures(); + UInt32 ReadBits(unsigned numBits); +diff --git a/CPP/7zip/Compress/Rar3Decoder.cpp b/CPP/7zip/Compress/Rar3Decoder.cpp +index 3bf2513..6cb8a6a 100644 +--- a/CPP/7zip/Compress/Rar3Decoder.cpp ++++ b/CPP/7zip/Compress/Rar3Decoder.cpp +@@ -92,7 +92,8 @@ CDecoder::CDecoder(): + _writtenFileSize(0), + _vmData(0), + _vmCode(0), +- m_IsSolid(false) ++ m_IsSolid(false), ++ _errorMode(false) + { + Ppmd7_Construct(&_ppmd); + } +@@ -545,6 +546,9 @@ HRESULT CDecoder::ReadTables(bool &keepDecompressing) + return InitPPM(); + } + ++ TablesRead = false; ++ TablesOK = false; ++ + _lzMode = true; + PrevAlignBits = 0; + PrevAlignCount = 0; +@@ -606,6 +610,9 @@ HRESULT CDecoder::ReadTables(bool &keepDecompressing) + } + } + } ++ if (InputEofError()) ++ return S_FALSE; ++ + TablesRead = true; + + // original code has check here: +@@ -623,6 +630,9 @@ HRESULT CDecoder::ReadTables(bool &keepDecompressing) + RIF(m_LenDecoder.Build(&newLevels[kMainTableSize + kDistTableSize + kAlignTableSize])); + + memcpy(m_LastLevels, newLevels, kTablesSizesSum); ++ ++ TablesOK = true; ++ + return S_OK; + } + +@@ -824,7 +834,12 @@ HRESULT CDecoder::CodeReal(ICompressProgressInfo *progress) + PpmEscChar = 2; + PpmError = true; + InitFilters(); ++ _errorMode = false; + } ++ ++ if (_errorMode) ++ return S_FALSE; ++ + if (!m_IsSolid || !TablesRead) + { + bool keepDecompressing; +@@ -838,6 +853,8 @@ HRESULT CDecoder::CodeReal(ICompressProgressInfo *progress) + bool keepDecompressing; + if (_lzMode) + { ++ if (!TablesOK) ++ return S_FALSE; + RINOK(DecodeLZ(keepDecompressing)) + } + else +@@ -901,8 +918,8 @@ STDMETHODIMP CDecoder::Code(ISequentialInStream *inStream, ISequentialOutStream + _unpackSize = outSize ? *outSize : (UInt64)(Int64)-1; + return CodeReal(progress); + } +- catch(const CInBufferException &e) { return e.ErrorCode; } +- catch(...) { return S_FALSE; } ++ catch(const CInBufferException &e) { _errorMode = true; return e.ErrorCode; } ++ catch(...) { _errorMode = true; return S_FALSE; } + // CNewException is possible here. But probably CNewException is caused + // by error in data stream. + } +diff --git a/CPP/7zip/Compress/Rar3Decoder.h b/CPP/7zip/Compress/Rar3Decoder.h +index c130cec..2f72d7d 100644 +--- a/CPP/7zip/Compress/Rar3Decoder.h ++++ b/CPP/7zip/Compress/Rar3Decoder.h +@@ -192,6 +192,7 @@ class CDecoder: + UInt32 _lastFilter; + + bool m_IsSolid; ++ bool _errorMode; + + bool _lzMode; + bool _unsupportedFilter; +@@ -200,6 +201,7 @@ class CDecoder: + UInt32 PrevAlignCount; + + bool TablesRead; ++ bool TablesOK; + + CPpmd7 _ppmd; + int PpmEscChar; diff --git a/package/p7zip/p7zip.mk b/package/p7zip/p7zip.mk index be95995bab..59cd9b7e95 100644 --- a/package/p7zip/p7zip.mk +++ b/package/p7zip/p7zip.mk @@ -14,6 +14,8 @@ P7ZIP_LICENSE_FILES = DOC/License.txt P7ZIP_IGNORE_CVES += CVE-2016-9296 # 0002-CVE-2017-17969.patch P7ZIP_IGNORE_CVES += CVE-2017-17969 +# 0003-CVE-2018-5996.patch +P7ZIP_IGNORE_CVES += CVE-2018-5996 # p7zip buildsystem is a mess: it plays dirty tricks with CFLAGS and # CXXFLAGS, so we can't pass them. Instead, it accepts ALLFLAGS_C -- 2.30.2