An information disclosure flaw was found in the way XMLHttpRequest object implementation in Qt, a software toolkit for developing applications, performed management of certain HTTP responses. Previous implementation allowed redirection from HTTP protocol to file schemas. Also the redirection handling was performed automatically by QML application and could not be disabled. A remote attacker could use this flaw to cause QML application in an unauthorized way to read local file content by causing the HTTP response for the application to be a redirect to a file: URL (file scheme).

References: [1] http://lists.qt-project.org/pipermail/announce/2012-November/000014.html

QSslSocket in Qt before 4.7.0-rc1 recognizes a wildcard IP address in the subject's Common Name field of an X.509 certificate, which might allow man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

The QSslSocketBackendPrivate::transmit function in srcnetworksslqsslsocketopenssl.cpp in Qt 4.6.3 and earlier allows remote attackers to cause a denial of service (infinite loop) via a malformed request.

An off by one memory corruption issue exists in WebSocketHandshake::readServerHandshake(). This issue is addressed by improved bounds checking.

References:

Bugzilla: https://bugs.webkit.org/showbug.cgi?id=36339 Trac: http://trac.webkit.org/changeset/56380

Acknowledgements:

Red Hat would like to thank Drew Yao of Apple Product Security for responsibly reporting this issue. Upstream acknowledges Skylined of Google Chrome Security Team as the original reporter.

QXmlSimpleReader in Qt before 5.2 allows context-dependent attackers to cause a denial of service (memory consumption) via an XML Entity Expansion (XEE) attack.

Multiple buffer overflows in plugins/imageformats/ico/qicohandler.cpp in the QtBase module in Qt before 4.8.7 and 5.x before 5.4.2 allow remote attackers to cause a denial of service (segmentation fault and crash) and possibly execute arbitrary code via a crafted ICO image.

Multiple buffer overflows in gui/image/qgifhandler.cpp in the QtBase module in Qt before 4.8.7 and 5.x before 5.4.2 allow remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a crafted GIF image.

Multiple buffer overflows in gui/image/qbmphandler.cpp in the QtBase module in Qt before 4.8.7 and 5.x before 5.4.2 allow remote attackers to cause a denial of service (segmentation fault and crash) and possibly execute arbitrary code via a crafted BMP image.

The BMP decoder in QtGui in QT before 5.5 does not properly calculate the masks used to extract the color components, which allows remote attackers to cause a denial of service (divide-by-zero and crash) via a crafted BMP file.