A flaw was found in the GIF parser of GdkPixbuf’s LZW decoder. When an invalid symbol is encountered during decompression, the decoder sets the reported output size to the full buffer length rather than the actual number of written bytes. This logic error results in uninitialized sections of the buffer being included in the output, potentially leaking arbitrary memory contents in the processed image.

GNOME gdk-pixbuf (aka GdkPixbuf) before 2.42.2 allows a denial of service (infinite loop) in lzw.c in the function writeindexes. if c->selfcode equals 10, self->codetable[10].extends will assign the value 11 to c. The next execution in the loop will assign self->codetable[11].extends to c, which will give the value of 10. This will make the loop run infinitely. This bug can, for example, be triggered by calling this function with a GIF image with LZW compression that is crafted in a special way.

A flaw was found in gdk-pixbuf in versions before 2.42.0. An integer wraparound leading to an out of bounds write can occur when a crafted GIF image is loaded. An attacker may cause applications to crash or could potentially execute code on the victim system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Integer overflow in the makefiltertable function in pixops/pixops.c in gdk-pixbuf before 2.31.5, as used in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 on Linux, Google Chrome on Linux, and other products, allows remote attackers to execute arbitrary code or cause a denial of service (heap-based buffer overflow and application crash) via crafted bitmap dimensions that are mishandled during scaling.

An exploitable heap overflow vulnerability exists in the gdkpixbufjpegimageloadincrement functionality of Gdk-Pixbuf 2.36.6. A specially crafted jpeg file can cause a heap overflow resulting in remote code execution. An attacker can send a file or url to trigger this vulnerability.

In GNOME GdkPixbuf (aka gdk-pixbuf) through 2.42.10, the ANI (Windows animated cursor) decoder encounters heap memory corruption (in aniloadchunk in io-ani.c) when parsing chunks in a crafted .ani file. A crafted file could allow an attacker to overwrite heap metadata, leading to a denial of service or code execution attack. This occurs in gdkpixbufsetoption() in gdk-pixbuf.c.

Integer overflow in pixbufcreatefromxpm (io-xpm.c) in the XPM image decoder for gtk+ 2.4.4 (gtk2) and earlier, and gdk-pixbuf before 0.22, allows remote attackers to execute arbitrary code via certain ncol and cpp values that enable a heap-based buffer overflow. NOTE: this identifier is ONLY for gtk+. It was incorrectly referenced in an advisory for a different issue (CVE-2004-0687).

Integer overflow in the ICO image decoder for (1) gdk-pixbuf before 0.22 and (2) gtk2 before 2.2.4 allows remote attackers to cause a denial of service (application crash) via a crafted ICO file.

The BMP image processor for (1) gdk-pixbuf before 0.22 and (2) gtk2 before 2.2.4 allows remote attackers to cause a denial of service (infinite loop) via a crafted BMP file.

Stack-based buffer overflow in xpmextractcolor (io-xpm.c) in the XPM image decoder for gtk+ 2.4.4 (gtk2) and earlier, and gdk-pixbuf before 0.22, may allow remote attackers to execute arbitrary code via a certain color string. NOTE: this identifier is ONLY for gtk+. It was incorrectly referenced in an advisory for a different issue (CVE-2004-0688).

gdk-pixbuf before 0.20 allows attackers to cause a denial of service (crash) via a malformed bitmap (BMP) file.

Integer overflow in the GTK+ gdk-pixbuf XPM image rendering library in GTK+ 2.4.0 allows attackers to execute arbitrary code via an XPM file with a number of colors that causes insufficient memory to be allocated, which leads to a heap-based buffer overflow.

Integer overflow in io-xpm.c in gdk-pixbuf 0.22.0 in GTK+ before 2.8.7 allows attackers to cause a denial of service (crash) or execute arbitrary code via an XPM file with large height, width, and colour values, a different vulnerability than CVE-2005-3186.

io-xpm.c in the gdk-pixbuf XPM image rendering library in GTK+ before 2.8.7 allows attackers to cause a denial of service (infinite loop) via a crafted XPM image with a large number of colors.

The gdkpixbufgifimageload function in gdk-pixbuf/io-gif.c in gdk-pixbuf before 2.23.5 does not properly handle certain return values, which allows remote attackers to cause a denial of service (memory consumption) via a crafted GIF image file.

Multiple integer overflows in the readbitmapfiledata function in io-xbm.c in gdk-pixbuf before 2.26.1 allow remote attackers to cause a denial of service (application crash) via a negative (1) height or (2) width in an XBM file, which triggers a heap-based buffer overflow.

Multiple integer overflows in the (1) pixopscompositenearest, (2) pixopscompositecolornearest, and (3) pixopsprocess functions in pixops/pixops.c in gdk-pixbuf before 2.33.1 allow remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted image, which triggers a heap-based buffer overflow.

io-tga.c in gdk-pixbuf before 2.32.0 uses heap memory after its allocation failed, which allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) and possibly execute arbitrary code via a crafted Truevision TGA (TARGA) file.

Integer overflow in the pixopsscalenearest function in pixops/pixops.c in gdk-pixbuf before 2.32.1 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a crafted GIF image file, which triggers a heap-based buffer overflow.

The OneLine32 function in io-ico.c in gdk-pixbuf before 2.35.3 allows remote attackers to cause a denial of service (out-of-bounds write and crash) via crafted dimensions in an ICO file.

GNOME GdkPixbuf (aka GDK-PixBuf) before 2.42.8 allows a heap-based buffer overflow when compositing or clearing frames in GIF files, as demonstrated by io-gif-animation.c compositeframe. This overflow is controllable and could be abused for code execution, especially on 32-bit systems.

GNOME gdk-pixbuf 2.42.6 is vulnerable to a heap-buffer overflow vulnerability when decoding the lzw compressed stream of image data in GIF files with lzw minimum code size equals to 12.

In GNOME GdkPixbuf (aka gdk-pixbuf) through 2.42.10, the ANI (Windows animated cursor) decoder encounters heap memory corruption (in aniloadchunk in io-ani.c) when parsing chunks in a crafted .ani file. A crafted file could allow an attacker to overwrite heap metadata, leading to a denial of service or code execution attack. This occurs in gdkpixbufsetoption() in gdk-pixbuf.c.

https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/202

Security researcher Gustavo Grieco reported a heap overflow in gdk-pixbuf affecting Linux systems using Gnome. This issue is triggered by the scaling of a malformed bitmap format image and results in a potentially exploitable crash.

This issue only affects Linux systems running Gnome. Windows and OS X operating systems are unaffected.

External Reference:

https://www.mozilla.org/security/announce/2015/mfsa2015-88.html

Acknowledgements:

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Gustavo Grieco as the original reporter.