setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.
A possible QBpmHandler segmentation fault on malformed BMP file. A crafted filed could cause the application to crash.
Upstream patch:
https://codereview.qt-project.org/#/c/238749/
An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x before 6.2.11, 6.3.x through 6.5.x before 6.5.4, and 6.6.x before 6.6.2. network/access/http2/hpacktable.cpp has an incorrect HPack integer overflow check.
Buffer overflow in the TIFF reader in gui/image/qtiffhandler.cpp in Qt 4.7.4 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via the TIFFTAGSAMPLESPERPIXEL tag in a greyscale TIFF image with multiple samples per pixel.
Heap-based buffer overflow in the LookupMarkMarkPos function in the HarfBuzz module (harfbuzz-gpos.c), as used by Qt before 4.7.4 and Pango, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted font file.
The Google V8 engine, as used in Google Chrome before 44.0.2403.89 and QtWebEngineCore in Qt before 5.5.1, allows remote attackers to cause a denial of service (memory corruption) or execute arbitrary code via a crafted web site.
A possible QImage allocation failure was found in qgifhandler. A crafted file could cause the application to crash.
Upstream patch:
https://codereview.qt-project.org/#/c/235998/
An integer overflow vulnerability exists in the QML QtScript Reflect API of Qt Project Qt 6.3.2. A specially-crafted javascript code can trigger an integer overflow during memory allocation, which can lead to arbitrary code execution. Target application would need to access a malicious web page to trigger this vulnerability.
A buffer overflow vulnerability exists in the QML QtScript Reflect API of Qt Project Qt 6.3.2. A specially-crafted javascript code can trigger an out-of-bounds memory access, which can lead to arbitrary code execution. Target application would need to access a malicious web page to trigger this vulnerability.
An issue has been fixed in Qt versions 5.14.0 where QPluginLoader attempts to load plugins relative to the working directory, allowing attackers to execute arbitrary code via crafted files.
In Qt 5.9.x through 5.15.x before 5.15.9 and 6.x before 6.2.4 on Linux and UNIX, QProcess could execute a binary from the current working directory when not found in the PATH.
An issue was discovered in Qt before 5.15.15, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.1. When a SVG file with an image inside it is rendered, a QTextLayout buffer overflow can be triggered.
Heap-based buffer overflow in the BMP image format parser for the QT library (qt3) before 3.3.3 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code.
Dirk Mueller reported an off by one buffer overflow flaw in the way QT parses certain unicode strings.
To quote Dirk:
Ive found a off-by-one buffer overflow in QUtf8Decoder::toUnicode(). It is not exploitable with Qt 4.x or above because there is an additional QChar(0) being allocated in QString, however it is still a bug there, as the array returned by utf16() etc is no longer terminated properly.
Qt through 5.14 allows an exponential XML entity expansion attack via a crafted SVG document that is mishandled in QXmlStreamReader, a related issue to CVE-2003-1564.
Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other products, mishandles OpenSSL's error queue, which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions, an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected, regardless of the Qt version.)
The named pipes in qtsingleapp in Qt 5.x, as used in qBittorrent and SugarSync, are configured for remote access and allow remote attackers to cause a denial of service (application crash) via an unspecified string.
A keystroke logging issue was discovered in Virtual Keyboard in Qt 5.7.x, 5.8.x, 5.9.x, 5.10.x, and 5.11.x before 5.11.3.
Qt through 5.15.8 and 6.x through 6.2.3 can load system library files from an unintended working directory.
CVE-2023-38197 An issue was discovered in Qt before 5.15.15, 6.x before 6.2.10, and 6.3.x through 6.5.x before 6.5.3. There are infinite loops in recursive entity expansion. CVE-2023-37369 In Qt before 5.15.15, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.2, there can be an application crash in QXmlStreamReader via a crafted XML string that triggers a situation in which a prefix is greater than a length.
An issue was discovered in HTTP2 in Qt before 5.15.18, 6.x before 6.2.13, 6.3.x through 6.5.x before 6.5.7, and 6.6.x through 6.7.x before 6.7.3. Code to make security-relevant decisions about an established connection may execute too early, because the encrypted() signal has not yet been emitted and processed..
Dirk Mueller reported an off by one buffer overflow flaw in the way QT parses certain unicode strings.
To quote Dirk:
Ive found a off-by-one buffer overflow in QUtf8Decoder::toUnicode(). It is not exploitable with Qt 4.x or above because there is an additional QChar(0) being allocated in QString, however it is still a bug there, as the array returned by utf16() etc is no longer terminated properly.
Multiple format string vulnerabilities in (1) qtextedit.cpp, (2) qdatatable.cpp, (3) qsqldatabase.cpp, (4) qsqlindex.cpp, (5) qsqlrecord.cpp, (6) qglobal.cpp, and (7) qsvgdevice.cpp in QTextEdit in Trolltech Qt 3 before 3.3.8 20070727 allow remote attackers to execute arbitrary code via format string specifiers in text used to compose an error message.
SQL injection vulnerability in Quassel IRC before 0.9.1, when Qt 4.8.5 or later and PostgreSQL 8.2 or later are used, allows remote attackers to execute arbitrary SQL commands via a \ (backslash) in a message.
In Qt 6.5.4, 6.5.5, and 6.6.2, QNetworkReply header data might be accessed via a dangling pointer in Qt for WebAssembly (wasm). (Earlier and later versions are unaffected.)
A TGA handler of QT imageformats incorrectly checks for large image sizes. A malformed image file could cause CPU exhaustion and denial of service.
References:
https://codereview.qt-project.org/#/c/237761/
An issue was discovered in Qt before 5.15.16, 6.x before 6.2.10, and 6.3.x through 6.5.x before 6.5.3 on Windows. When using the GDI font engine, if a corrupted font is loaded via QFontDatabase::addApplicationFont{FromData], then it can cause the application to crash because of missing length checks.
An issue was discovered in Qt before 5.15.14, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.1. Qt Network incorrectly parses the strict-transport-security (HSTS) header, allowing unencrypted connections to be established, even when explicitly prohibited by the server. This happens if the case used for this header does not exactly match.
An issue was discovered in Qt through 5.12.9, and 5.13.x through 5.15.x before 5.15.1. readxbmbody in gui/image/qxbmhandler.cpp has a buffer over-read.
ownCloud Desktop Client before 2.0.1, when compiled with a Qt release after 5.3.x, does not call QNetworkReply::ignoreSslErrors with the list of errors to be ignored, which makes it easier for remote attackers to conduct man-in-the-middle (MITM) attacks by leveraging a server using a self-signed certificate. NOTE: this vulnerability exists because of a partial CVE-2015-4456 regression.