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Code Issues Releases Activity

Fix handling of overlong UTF8 sequences in Qt and kdelibs, which, unpatched,

Browse Source 
introduces XSS vulnerabilities in Konqueror and potentially affect any
Qt/KDE applications which deal with URLs or paths from untrusted locations.

Security:	CVE-2007-0242
This commit is contained in:
Michael Nottebrock 2007-03-30 18:15:08 +00:00
parent 200db6b63d
commit bf4e60e8bf
Notes: svn2git 2021-03-31 03:12:20 +00:00 
svn path=/head/; revision=188834
8 changed files with 314 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
devel/qt4-corelib/Makefile
View File

@ -8,7 +8,7 @@
PORTNAME= corelib
PORTVERSION= 4.2.3
PORTREVISION= 0
PORTREVISION= 1
CATEGORIES?= devel
MASTER_SITES= ${MASTER_SITE_QT}
PKGNAMEPREFIX= qt4-
@ -62,6 +62,7 @@ EXTRACT_AFTER_ARGS=| ${TAR} -xf - \
--exclude '${DISTNAME}/tools/qtconfig' --exclude '${DISTNAME}/tools/qvfb'
WRKSRC= ${WRKDIR}/${DISTNAME}/src/${PORTNAME}
CONFIGURE_WRKSRC=${WRKSRC}/../../
PATCH_WRKSRC=${WRKSRC}/../../
.include <bsd.port.pre.mk>

132
devel/qt4-corelib/files/patch-utf8-bug-qt4 Normal file
View File

@ -0,0 +1,132 @@
--- src/corelib/tools/qstring.cpp
+++ src/corelib/tools/qstring.cpp
@@ -3342,6 +3342,7 @@ QString QString::fromUtf8(const char *st
result.resize(size); // worst case
ushort *qch = result.d->data;
uint uc = 0;
+ uint min_uc = 0;
int need = 0;
int error = -1;
uchar ch;
@@ -3359,6 +3360,12 @@ QString QString::fromUtf8(const char *st
ushort low = uc%0x400 + 0xdc00;
*qch++ = high;
*qch++ = low;
+ } else if ((uc < min_uc) || (uc >= 0xd800 && uc <= 0xdfff) || (uc >= 0xfffe)) {
+ // overlong seqence, UTF16 surrogate or BOM
+ i = error;
+ qch = addOne(qch, result);
+ *qch++ = 0xdbff;
+ *qch++ = 0xde00 + ((uchar)str[i]);
} else {
*qch++ = uc;
}
@@ -3381,14 +3388,17 @@ QString QString::fromUtf8(const char *st
uc = ch & 0x1f;
need = 1;
error = i;
+ min_uc = 0x80;
} else if ((ch & 0xf0) == 0xe0) {
uc = ch & 0x0f;
need = 2;
error = i;
+ min_uc = 0x800;
} else if ((ch&0xf8) == 0xf0) {
uc = ch & 0x07;
need = 3;
error = i;
+ min_uc = 0x10000;
} else {
// Error
qch = addOne(qch, result);
--- src/corelib/codecs/qutfcodec.cpp
+++ src/corelib/codecs/qutfcodec.cpp
@@ -117,15 +117,19 @@ QString QUtf8Codec::convertToUnicode(con
bool headerdone = false;
QChar replacement = QChar::ReplacementCharacter;
int need = 0;
+ int error = -1;
uint uc = 0;
+ uint min_uc = 0;
if (state) {
if (state->flags & IgnoreHeader)
headerdone = true;
if (state->flags & ConvertInvalidToNull)
replacement = QChar::Null;
need = state->remainingChars;
- if (need)
+ if (need) {
uc = state->state_data[0];
+ min_uc = state->state_data[1];
+ }
}
if (!headerdone && len > 3
&& (uchar)chars[0] == 0xef && (uchar)chars[1] == 0xbb && (uchar)chars[2] == 0xbf) {
@@ -142,7 +146,7 @@ QString QUtf8Codec::convertToUnicode(con
int invalid = 0;
for (int i=0; i<len; i++) {
- ch = *chars++;
+ ch = chars[i];
if (need) {
if ((ch&0xc0) == 0x80) {
uc = (uc << 6) | (ch & 0x3f);
@@ -153,14 +157,27 @@ QString QUtf8Codec::convertToUnicode(con
uc -= 0x10000;
unsigned short high = uc/0x400 + 0xd800;
unsigned short low = uc%0x400 + 0xdc00;
+
+ // resize if necessary
+ long where = qch - result.unicode();
+ if (where + 2 >= result.size()) {
+ result.resize(where + 2);
+ qch = result.data() + where;
+ }
+
*qch++ = QChar(high);
*qch++ = QChar(low);
+ } else if ((uc < min_uc) || (uc >= 0xd800 && uc <= 0xdfff) || (uc >= 0xfffe)) {
+ // error
+ *qch++ = QChar::ReplacementCharacter;
+ ++invalid;
} else {
*qch++ = uc;
}
}
} else {
// error
+ i = error;
*qch++ = QChar::ReplacementCharacter;
++invalid;
need = 0;
@@ -171,12 +188,22 @@ QString QUtf8Codec::convertToUnicode(con
} else if ((ch & 0xe0) == 0xc0) {
uc = ch & 0x1f;
need = 1;
+ error = i;
+ min_uc = 0x80;
} else if ((ch & 0xf0) == 0xe0) {
uc = ch & 0x0f;
need = 2;
+ error = i;
+ min_uc = 0x800;
} else if ((ch&0xf8) == 0xf0) {
uc = ch & 0x07;
need = 3;
+ error = i;
+ min_uc = 0x10000;
+ } else {
+ // error
+ *qch++ = QChar::ReplacementCharacter;
+ ++invalid;
}
}
}
@@ -187,6 +214,7 @@ QString QUtf8Codec::convertToUnicode(con
if (headerdone)
state->flags |= IgnoreHeader;
state->state_data[0] = need ? uc : 0;
+ state->state_data[1] = need ? min_uc : 0;
}
return result;
}

1
x11-toolkits/qt33/Makefile
View File

@ -8,6 +8,7 @@
PORTNAME= qt
PORTVERSION= 3.3.8
PORTREVISION= 1
CATEGORIES?= x11-toolkits ipv6
MASTER_SITES= ${MASTER_SITE_QT}
DISTNAME= qt-x11-free-${PORTVERSION}

101
x11-toolkits/qt33/files/patch-utf8-bug-qt3 Normal file
View File

@ -0,0 +1,101 @@
--- src/codecs/qutfcodec.cpp
+++ src/codecs/qutfcodec.cpp
@@ -154,6 +154,7 @@
class QUtf8Decoder : public QTextDecoder {
uint uc;
+ uint min_uc;
int need;
bool headerDone;
public:
@@ -167,8 +168,9 @@
result.setLength( len ); // worst case
QChar *qch = (QChar *)result.unicode();
uchar ch;
+ int error = -1;
for (int i=0; i<len; i++) {
- ch = *chars++;
+ ch = chars[i];
if (need) {
if ( (ch&0xc0) == 0x80 ) {
uc = (uc << 6) | (ch & 0x3f);
@@ -182,6 +184,8 @@
*qch++ = QChar(high);
*qch++ = QChar(low);
headerDone = TRUE;
+ } else if ((uc < min_uc) || (uc >= 0xd800 && uc <= 0xdfff) || (uc >= 0xfffe)) {
+ *qch++ = QChar::replacement;
} else {
if (headerDone || QChar(uc) != QChar::byteOrderMark)
*qch++ = uc;
@@ -190,6 +194,7 @@
}
} else {
// error
+ i = error;
*qch++ = QChar::replacement;
need = 0;
}
@@ -200,12 +205,21 @@
} else if ((ch & 0xe0) == 0xc0) {
uc = ch & 0x1f;
need = 1;
+ error = i;
+ min_uc = 0x80;
} else if ((ch & 0xf0) == 0xe0) {
uc = ch & 0x0f;
need = 2;
+ error = i;
+ min_uc = 0x800;
} else if ((ch&0xf8) == 0xf0) {
uc = ch & 0x07;
need = 3;
+ error = i;
+ min_uc = 0x10000;
+ } else {
+ // error
+ *qch++ = QChar::replacement;
}
}
}
--- src/tools/qstring.cpp
+++ src/tools/qstring.cpp
@@ -5805,6 +5805,7 @@
result.setLength( len ); // worst case
QChar *qch = (QChar *)result.unicode();
uint uc = 0;
+ uint min_uc = 0;
int need = 0;
int error = -1;
uchar ch;
@@ -5822,6 +5823,12 @@
unsigned short low = uc%0x400 + 0xdc00;
*qch++ = QChar(high);
*qch++ = QChar(low);
+ } else if (uc < min_uc || (uc >= 0xd800 && uc <= 0xdfff) || (uc >= 0xfffe)) {
+ // overlong seqence, UTF16 surrogate or BOM
+ i = error;
+ qch = addOne(qch, result);
+ *qch++ = QChar(0xdbff);
+ *qch++ = QChar(0xde00+((uchar)utf8[i]));
} else {
*qch++ = uc;
}
@@ -5844,14 +5851,17 @@
uc = ch & 0x1f;
need = 1;
error = i;
+ min_uc = 0x80;
} else if ((ch & 0xf0) == 0xe0) {
uc = ch & 0x0f;
need = 2;
error = i;
+ min_uc = 0x800;
} else if ((ch&0xf8) == 0xf0) {
uc = ch & 0x07;
need = 3;
error = i;
+ min_uc = 0x10000;
} else {
// Error
qch = addOne(qch, result);

2
x11/kdelibs3/Makefile
View File

@ -8,7 +8,7 @@
PORTNAME= kdelibs
PORTVERSION= ${KDE_VERSION}
PORTREVISION= 1
PORTREVISION= 2
CATEGORIES= x11 kde ipv6
MASTER_SITES= ${MASTER_SITE_KDE}
MASTER_SITE_SUBDIR= stable/${PORTVERSION:S/.0//}/src

38
x11/kdelibs3/files/patch-kdelibs-kjs Normal file
View File

@ -0,0 +1,38 @@
------------------------------------------------------------------------
r645387 | porten | 2007-03-22 15:01:13 +0100 (Thu, 22 Mar 2007) | 4 lines
substitute some of the invalid sequences with the standard replacement
char. this matches Mozilla but not IE which leaves them unchanged (or
throws an exception)
------------------------------------------------------------------------
--- kjs/function.cpp
+++ kjs/function.cpp
@@ -244,11 +244,15 @@ UString decodeURI(ExecState *exec, UStri
}
// UTF-8 transform
+ const unsigned long replacementChar = 0xFFFD;
unsigned long V;
if (n == 2) {
unsigned long yyyyy = octets[0] & 0x1F;
unsigned long zzzzzz = octets[1] & 0x3F;
V = (yyyyy << 6) | zzzzzz;
+ // 2-byte sequence overlong for this value?
+ if (V < 0xFF)
+ V = replacementChar;
C = UChar((unsigned short)V);
}
else if (n == 3) {
@@ -256,6 +260,11 @@ UString decodeURI(ExecState *exec, UStri
unsigned long yyyyyy = octets[1] & 0x3F;
unsigned long zzzzzz = octets[2] & 0x3F;
V = (xxxx << 12) | (yyyyyy << 6) | zzzzzz;
+ // 3-byte sequence overlong for this value,
+ // an invalid value or UTF-16 surrogate?
+ if (V < 0x800 || V == 0xFFFE || V == 0xFFFF ||
+ (V >= 0xD800 && V <= 0xDFFF))
+ V = replacementChar;
C = UChar((unsigned short)V);
}
else {

2
x11/kdelibs4/Makefile
View File

@ -8,7 +8,7 @@
PORTNAME= kdelibs
PORTVERSION= ${KDE_VERSION}
PORTREVISION= 1
PORTREVISION= 2
CATEGORIES= x11 kde ipv6
MASTER_SITES= ${MASTER_SITE_KDE}
MASTER_SITE_SUBDIR= stable/${PORTVERSION:S/.0//}/src

38
x11/kdelibs4/files/patch-kdelibs-kjs Normal file
View File

@ -0,0 +1,38 @@
------------------------------------------------------------------------
r645387 | porten | 2007-03-22 15:01:13 +0100 (Thu, 22 Mar 2007) | 4 lines
substitute some of the invalid sequences with the standard replacement
char. this matches Mozilla but not IE which leaves them unchanged (or
throws an exception)
------------------------------------------------------------------------
--- kjs/function.cpp
+++ kjs/function.cpp
@@ -244,11 +244,15 @@ UString decodeURI(ExecState *exec, UStri
}
// UTF-8 transform
+ const unsigned long replacementChar = 0xFFFD;
unsigned long V;
if (n == 2) {
unsigned long yyyyy = octets[0] & 0x1F;
unsigned long zzzzzz = octets[1] & 0x3F;
V = (yyyyy << 6) | zzzzzz;
+ // 2-byte sequence overlong for this value?
+ if (V < 0xFF)
+ V = replacementChar;
C = UChar((unsigned short)V);
}
else if (n == 3) {
@@ -256,6 +260,11 @@ UString decodeURI(ExecState *exec, UStri
unsigned long yyyyyy = octets[1] & 0x3F;
unsigned long zzzzzz = octets[2] & 0x3F;
V = (xxxx << 12) | (yyyyyy << 6) | zzzzzz;
+ // 3-byte sequence overlong for this value,
+ // an invalid value or UTF-16 surrogate?
+ if (V < 0x800 || V == 0xFFFE || V == 0xFFFF ||
+ (V >= 0xD800 && V <= 0xDFFF))
+ V = replacementChar;
C = UChar((unsigned short)V);
}
else {