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Accepting request 402773 from home:pjanouch:branches:devel:libraries:c_c++

Browse Source 
- added xerces-c-CVE-2016-2099.patch
  Exception handling mistake causing use after free
  (bsc#979208, CVE-2016-2099)
- xerces-c-CVE-2016-0729.patch
  Fix for mishandling certain kinds of malformed input documents,
  resulting in buffer overlows during processing and error reporting.
  The overflows can manifest as a segmentation fault or as memory
  corruption during a parse operation. (bsc#966822, CVE-2016-0729)

OBS-URL: https://build.opensuse.org/request/show/402773
OBS-URL: https://build.opensuse.org/package/show/devel:libraries:c_c++/xerces-c?expand=0&rev=21
This commit is contained in:
Ismail Dönmez 2016-06-18 16:00:10 +00:00 committed by Git OBS Bridge
parent f25b240f8e
commit 4ede327720
4 changed files with 415 additions and 1 deletions
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377
xerces-c-CVE-2016-0729.patch Normal file
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@ -0,0 +1,377 @@
Index: xerces-c-3.1.1/src/xercesc/internal/XMLReader.cpp
===================================================================
--- xerces-c-3.1.1.orig/src/xercesc/internal/XMLReader.cpp
+++ xerces-c-3.1.1/src/xercesc/internal/XMLReader.cpp
@@ -1460,8 +1460,30 @@ void XMLReader::doInitDecode()
while (fRawBufIndex < fRawBytesAvail)
{
- // Security fix: make sure there are at least sizeof(UCS4Ch) bytes to consume.
+ // Make sure there are at least sizeof(UCS4Ch) bytes to consume.
if (fRawBufIndex + sizeof(UCS4Ch) > fRawBytesAvail) {
+ fCharsAvail = 0;
+ fRawBufIndex = 0;
+ fMemoryManager->deallocate(fPublicId);
+ fMemoryManager->deallocate(fEncodingStr);
+ ArrayJanitor<XMLCh> janValue(fSystemId, fMemoryManager);
+ ThrowXMLwithMemMgr1
+ (
+ TranscodingException
+ , XMLExcepts::Reader_CouldNotDecodeFirstLine
+ , fSystemId
+ , fMemoryManager
+ );
+ }
+
+ // Make sure we don't exhaust the limited prolog buffer size.
+ // Leave room for a space added at the end of this function.
+ if (fCharsAvail == kCharBufSize - 1) {
+ fCharsAvail = 0;
+ fRawBufIndex = 0;
+ fMemoryManager->deallocate(fPublicId);
+ fMemoryManager->deallocate(fEncodingStr);
+ ArrayJanitor<XMLCh> janValue(fSystemId, fMemoryManager);
ThrowXMLwithMemMgr1
(
TranscodingException
@@ -1547,6 +1569,23 @@ void XMLReader::doInitDecode()
const char curCh = *asChars++;
fRawBufIndex++;
+ // Make sure we don't exhaust the limited prolog buffer size.
+ // Leave room for a space added at the end of this function.
+ if (fCharsAvail == kCharBufSize - 1) {
+ fCharsAvail = 0;
+ fRawBufIndex = 0;
+ fMemoryManager->deallocate(fPublicId);
+ fMemoryManager->deallocate(fEncodingStr);
+ ArrayJanitor<XMLCh> janValue(fSystemId, fMemoryManager);
+ ThrowXMLwithMemMgr1
+ (
+ TranscodingException
+ , XMLExcepts::Reader_CouldNotDecodeFirstLine
+ , fSystemId
+ , fMemoryManager
+ );
+ }
+
// Looks ok, so store it
fCharSizeBuf[fCharsAvail] = 1;
fCharBuf[fCharsAvail++] = XMLCh(curCh);
@@ -1630,8 +1669,30 @@ void XMLReader::doInitDecode()
while (fRawBufIndex < fRawBytesAvail)
{
- // Security fix: make sure there are at least sizeof(UTF16Ch) bytes to consume.
+ // Make sure there are at least sizeof(UTF16Ch) bytes to consume.
if (fRawBufIndex + sizeof(UTF16Ch) > fRawBytesAvail) {
+ fCharsAvail = 0;
+ fRawBufIndex = 0;
+ fMemoryManager->deallocate(fPublicId);
+ fMemoryManager->deallocate(fEncodingStr);
+ ArrayJanitor<XMLCh> janValue(fSystemId, fMemoryManager);
+ ThrowXMLwithMemMgr1
+ (
+ TranscodingException
+ , XMLExcepts::Reader_CouldNotDecodeFirstLine
+ , fSystemId
+ , fMemoryManager
+ );
+ }
+
+ // Make sure we don't exhaust the limited prolog buffer size.
+ // Leave room for a space added at the end of this function.
+ if (fCharsAvail == kCharBufSize - 1) {
+ fCharsAvail = 0;
+ fRawBufIndex = 0;
+ fMemoryManager->deallocate(fPublicId);
+ fMemoryManager->deallocate(fEncodingStr);
+ ArrayJanitor<XMLCh> janValue(fSystemId, fMemoryManager);
ThrowXMLwithMemMgr1
(
TranscodingException
@@ -1676,6 +1737,24 @@ void XMLReader::doInitDecode()
const XMLCh chCur = XMLEBCDICTranscoder::xlatThisOne(*srcPtr++);
fRawBufIndex++;
+ // Make sure we don't exhaust the limited prolog buffer size.
+ // Leave room for a space added at the end of this function.
+ if (fCharsAvail == kCharBufSize - 1) {
+ fCharsAvail = 0;
+ fRawBufIndex = 0;
+ fMemoryManager->deallocate(fPublicId);
+ fMemoryManager->deallocate(fEncodingStr);
+ ArrayJanitor<XMLCh> janValue(fSystemId, fMemoryManager);
+ ThrowXMLwithMemMgr1
+ (
+ TranscodingException
+ , XMLExcepts::Reader_CouldNotDecodeFirstLine
+ , fSystemId
+ , fMemoryManager
+ );
+ }
+
+
//
// And put it into the character buffer. This stuff has to
// look like it was normally transcoded.
@@ -1730,7 +1809,7 @@ void XMLReader::doInitDecode()
//
void XMLReader::refreshRawBuffer()
{
- // Security fix: make sure we don't underflow on the subtraction.
+ // Make sure we don't underflow on the subtraction.
if (fRawBufIndex > fRawBytesAvail) {
ThrowXMLwithMemMgr1
(
Index: xerces-c-3.1.1/src/xercesc/util/XMLURL.cpp
===================================================================
--- xerces-c-3.1.1.orig/src/xercesc/util/XMLURL.cpp
+++ xerces-c-3.1.1/src/xercesc/util/XMLURL.cpp
@@ -611,9 +611,20 @@ BinInputStream* XMLURL::makeNewStream()
while (percentIndex != -1) {
- if (percentIndex+2 >= (int)end ||
- !isHexDigit(realPath[percentIndex+1]) ||
- !isHexDigit(realPath[percentIndex+2]))
+ // Isolate the length/boundary check so we don't try and copy off the end.
+ if (percentIndex+2 >= (int)end)
+ {
+ XMLCh value1[3];
+ value1[1] = chNull;
+ value1[2] = chNull;
+ XMLString::moveChars(value1, &(realPath[percentIndex]), (percentIndex + 1 >= (int)end ? 1 : 2));
+ ThrowXMLwithMemMgr2(MalformedURLException
+ , XMLExcepts::XMLNUM_URI_Component_Invalid_EscapeSequence
+ , realPath
+ , value1
+ , fMemoryManager);
+ }
+ else if (!isHexDigit(realPath[percentIndex+1]) || !isHexDigit(realPath[percentIndex+2]))
{
XMLCh value1[4];
XMLString::moveChars(value1, &(realPath[percentIndex]), 3);
Index: xerces-c-3.1.1/src/xercesc/util/XMLUri.cpp
===================================================================
--- xerces-c-3.1.1.orig/src/xercesc/util/XMLUri.cpp
+++ xerces-c-3.1.1/src/xercesc/util/XMLUri.cpp
@@ -875,11 +875,21 @@ void XMLUri::initializePath(const XMLCh*
// check for valid escape sequence
if (testChar == chPercent)
{
- if (index+2 >= end ||
- !XMLString::isHex(uriSpec[index+1]) ||
- !XMLString::isHex(uriSpec[index+2]))
+ if (index + 2 >= end)
{
- XMLCh value1[BUF_LEN+1];
+ XMLCh value1[3];
+ value1[1] = chNull;
+ value1[2] = chNull;
+ XMLString::moveChars(value1, &(uriSpec[index]), (index + 1 >= end ? 1 : 2));
+ ThrowXMLwithMemMgr2(MalformedURLException
+ , XMLExcepts::XMLNUM_URI_Component_Invalid_EscapeSequence
+ , errMsg_PATH
+ , value1
+ , fMemoryManager);
+ }
+ else if (!XMLString::isHex(uriSpec[index+1]) || !XMLString::isHex(uriSpec[index+2]))
+ {
+ XMLCh value1[4];
XMLString::moveChars(value1, &(uriSpec[index]), 3);
value1[3] = chNull;
ThrowXMLwithMemMgr2(MalformedURLException
@@ -892,7 +902,7 @@ void XMLUri::initializePath(const XMLCh*
else if (!isUnreservedCharacter(testChar) &&
!isPathCharacter(testChar))
{
- XMLCh value1[BUF_LEN+1];
+ XMLCh value1[2];
value1[0] = testChar;
value1[1] = chNull;
ThrowXMLwithMemMgr2(MalformedURLException
@@ -920,11 +930,21 @@ void XMLUri::initializePath(const XMLCh*
// check for valid escape sequence
if (testChar == chPercent)
{
- if (index+2 >= end ||
- !XMLString::isHex(uriSpec[index+1]) ||
- !XMLString::isHex(uriSpec[index+2]))
+ if (index + 2 >= end)
{
- XMLCh value1[BUF_LEN+1];
+ XMLCh value1[3];
+ value1[1] = chNull;
+ value1[2] = chNull;
+ XMLString::moveChars(value1, &(uriSpec[index]), (index + 1 >= end ? 1 : 2));
+ ThrowXMLwithMemMgr2(MalformedURLException
+ , XMLExcepts::XMLNUM_URI_Component_Invalid_EscapeSequence
+ , errMsg_PATH
+ , value1
+ , fMemoryManager);
+ }
+ else if (!XMLString::isHex(uriSpec[index+1]) || !XMLString::isHex(uriSpec[index+2]))
+ {
+ XMLCh value1[4];
XMLString::moveChars(value1, &(uriSpec[index]), 3);
value1[3] = chNull;
ThrowXMLwithMemMgr2(MalformedURLException
@@ -941,7 +961,7 @@ void XMLUri::initializePath(const XMLCh*
// contains '[' and ']'.
else if (!isReservedOrUnreservedCharacter(testChar))
{
- XMLCh value1[BUF_LEN+1];
+ XMLCh value1[2];
value1[0] = testChar;
value1[1] = chNull;
ThrowXMLwithMemMgr2(MalformedURLException
@@ -979,11 +999,21 @@ void XMLUri::initializePath(const XMLCh*
if (testChar == chPercent)
{
- if (index+2 >= end ||
- !XMLString::isHex(uriSpec[index+1]) ||
- !XMLString::isHex(uriSpec[index+2]))
+ if (index + 2 >= end)
+ {
+ XMLCh value1[3];
+ value1[1] = chNull;
+ value1[2] = chNull;
+ XMLString::moveChars(value1, &(uriSpec[index]), (index + 1 >= end ? 1 : 2));
+ ThrowXMLwithMemMgr2(MalformedURLException
+ , XMLExcepts::XMLNUM_URI_Component_Invalid_EscapeSequence
+ , errMsg_QUERY
+ , value1
+ , fMemoryManager);
+ }
+ if (!XMLString::isHex(uriSpec[index+1]) || !XMLString::isHex(uriSpec[index+2]))
{
- XMLCh value1[BUF_LEN+1];
+ XMLCh value1[4];
XMLString::moveChars(value1, &(uriSpec[index]), 3);
value1[3] = chNull;
ThrowXMLwithMemMgr2(MalformedURLException
@@ -995,7 +1025,7 @@ void XMLUri::initializePath(const XMLCh*
}
else if (!isReservedOrUnreservedCharacter(testChar))
{
- XMLCh value1[BUF_LEN+1];
+ XMLCh value1[2];
value1[0] = testChar;
value1[1] = chNull;
ThrowXMLwithMemMgr2(MalformedURLException
@@ -1030,11 +1060,21 @@ void XMLUri::initializePath(const XMLCh*
if (testChar == chPercent)
{
- if (index+2 >= end ||
- !XMLString::isHex(uriSpec[index+1]) ||
- !XMLString::isHex(uriSpec[index+2]))
+ if (index + 2 >= end)
+ {
+ XMLCh value1[3];
+ value1[1] = chNull;
+ value1[2] = chNull;
+ XMLString::moveChars(value1, &(uriSpec[index]), (index + 1 >= end ? 1 : 2));
+ ThrowXMLwithMemMgr2(MalformedURLException
+ , XMLExcepts::XMLNUM_URI_Component_Invalid_EscapeSequence
+ , errMsg_FRAGMENT
+ , value1
+ , fMemoryManager);
+ }
+ if (!XMLString::isHex(uriSpec[index+1]) || !XMLString::isHex(uriSpec[index+2]))
{
- XMLCh value1[BUF_LEN+1];
+ XMLCh value1[4];
XMLString::moveChars(value1, &(uriSpec[index]), 3);
value1[3] = chNull;
ThrowXMLwithMemMgr2(MalformedURLException
@@ -1046,7 +1086,7 @@ void XMLUri::initializePath(const XMLCh*
}
else if (!isReservedOrUnreservedCharacter(testChar))
{
- XMLCh value1[BUF_LEN+1];
+ XMLCh value1[2];
value1[0] = testChar;
value1[1] = chNull;
ThrowXMLwithMemMgr2(MalformedURLException
@@ -1410,14 +1450,15 @@ void XMLUri::isConformantUserInfo(const
}
else if (*tmpStr == chPercent) // '%'
{
- if (XMLString::isHex(*(tmpStr+1)) && // 1st hex
- XMLString::isHex(*(tmpStr+2)) ) // 2nd hex
+ if (XMLString::stringLen(tmpStr) >= 3
+ && XMLString::isHex(*(tmpStr+1)) // 1st hex
+ && XMLString::isHex(*(tmpStr+2)) ) // 2nd hex
{
tmpStr+=3;
}
else
{
- XMLCh value1[BUF_LEN+1];
+ XMLCh value1[4];
value1[0] = chPercent;
value1[1] = *(tmpStr+1);
value1[2] = *(tmpStr+2);
@@ -1468,8 +1509,9 @@ bool XMLUri::isValidServerBasedAuthority
}
else if (userinfo[index] == chPercent) // '%'
{
- if (XMLString::isHex(userinfo[index+1]) && // 1st hex
- XMLString::isHex(userinfo[index+2]) ) // 2nd hex
+ if (index + 2 < userLen
+ && XMLString::isHex(userinfo[index+1]) // 1st hex
+ && XMLString::isHex(userinfo[index+2]) ) // 2nd hex
index +=3;
else
return false;
@@ -1508,8 +1550,9 @@ bool XMLUri::isValidServerBasedAuthority
}
else if (*tmpStr == chPercent) // '%'
{
- if (XMLString::isHex(*(tmpStr+1)) && // 1st hex
- XMLString::isHex(*(tmpStr+2)) ) // 2nd hex
+ if (XMLString::stringLen(tmpStr) >= 3
+ && XMLString::isHex(*(tmpStr+1)) // 1st hex
+ && XMLString::isHex(*(tmpStr+2)) ) // 2nd hex
{
tmpStr+=3;
}
@@ -1537,8 +1580,9 @@ bool XMLUri::isValidRegistryBasedAuthori
}
else if (authority[index] == chPercent) // '%'
{
- if (XMLString::isHex(authority[index+1]) && // 1st hex
- XMLString::isHex(authority[index+2]) ) // 2nd hex
+ if (index + 2 < authLen
+ && XMLString::isHex(authority[index+1]) // 1st hex
+ && XMLString::isHex(authority[index+2]) ) // 2nd hex
index +=3;
else
return false;
@@ -1566,8 +1610,9 @@ bool XMLUri::isValidRegistryBasedAuthori
}
else if (*tmpStr == chPercent) // '%'
{
- if (XMLString::isHex(*(tmpStr+1)) && // 1st hex
- XMLString::isHex(*(tmpStr+2)) ) // 2nd hex
+ if (XMLString::stringLen(tmpStr) >= 3
+ && XMLString::isHex(*(tmpStr + 1)) // 1st hex
+ && XMLString::isHex(*(tmpStr + 2))) // 2nd hex
{
tmpStr+=3;
}
@@ -1602,8 +1647,9 @@ bool XMLUri::isURIString(const XMLCh* co
}
else if (*tmpStr == chPercent) // '%'
{
- if (XMLString::isHex(*(tmpStr+1)) && // 1st hex
- XMLString::isHex(*(tmpStr+2)) ) // 2nd hex
+ if (XMLString::stringLen(tmpStr) >=3
+ && XMLString::isHex(*(tmpStr+1)) // 1st hex
+ && XMLString::isHex(*(tmpStr+2)) ) // 2nd hex
{
tmpStr+=3;
}

19
xerces-c-CVE-2016-2099.patch Normal file
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@ -0,0 +1,19 @@
--- src/xercesc/validators/DTD/DTDScanner.cpp (revision 1741478)
+++ src/xercesc/validators/DTD/DTDScanner.cpp (working copy)
@@ -2509,7 +2509,15 @@
{
while (true)
{
- const XMLCh nextCh = fReaderMgr->peekNextChar();
+ XMLCh nextCh;
+
+ try {
+ nextCh = fReaderMgr->peekNextChar();
+ }
+ catch (XMLException& ex) {
+ fScanner->emitError(XMLErrs::XMLException_Fatal, ex.getCode(), ex.getMessage(), NULL, NULL);
+ nextCh = chNull;
+ }
if (!nextCh)
{

12
xerces-c.changes
View File

@ -1,3 +1,15 @@
-------------------------------------------------------------------
Thu Jun 16 15:43:53 UTC 2016 - pjanouch@suse.de
- added xerces-c-CVE-2016-2099.patch
Exception handling mistake causing use after free
(bsc#979208, CVE-2016-2099)
- xerces-c-CVE-2016-0729.patch
Fix for mishandling certain kinds of malformed input documents,
resulting in buffer overlows during processing and error reporting.
The overflows can manifest as a segmentation fault or as memory
corruption during a parse operation. (bsc#966822, CVE-2016-0729)
-------------------------------------------------------------------
Mon Sep 28 16:19:17 UTC 2015 - mpluskal@suse.com

8
xerces-c.spec
View File

@ -1,7 +1,7 @@
#
# spec file for package xerces-c
#
# Copyright (c) 2015 SUSE LINUX GmbH, Nuernberg, Germany.
# Copyright (c) 2016 SUSE LINUX GmbH, Nuernberg, Germany.
#
# All modifications and additions to the file contributed by third parties
# remain the property of their copyright owners, unless otherwise agreed
@ -27,6 +27,10 @@ Source0: http://www.apache.org/dist/xerces/c/3/sources/%{name}-%{version}
Source1: http://www.apache.org/dist/xerces/c/3/sources/%{name}-%{version}.tar.gz.asc
Source2: %{name}.keyring
Source3: baselibs.conf
# PATCH-FIX-UPSTREAM bsc#966822
Patch2: %{name}-CVE-2016-0729.patch
# PATCH-FIX-UPSTREAM bsc#979208
Patch3: %{name}-CVE-2016-2099.patch
BuildRequires: fdupes
BuildRequires: gcc-c++
BuildRequires: libicu-devel
@ -91,6 +95,8 @@ This package includes files needed for development with Xerces-c
%prep
%setup -q -n xerces-c-%{version}
%patch2 -p1
%patch3 -p0
%build
%configure \