Red Hat Security Advisory: gd security update

Moderate

Buffer overflow in the LWZReadByte_ function in ext/gd/libgd/gd_gif_in.c in the GD extension in PHP before 5.1.5 allows remote attackers to have an unknown impact via a GIF file with input_code_size greater than MAX_LWZ_BITS, which triggers an overflow when initializing the table array.

Buffer overflow in the gdImageStringFTEx function in gdft.c in GD Graphics Library 2.0.33 and earlier allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a crafted string with a JIS encoded font.

The gdPngReadData function in libgd 2.0.34 allows user-assisted attackers to cause a denial of service (CPU consumption) via a crafted PNG image with truncated data, which causes an infinite loop in the png_read_info function in libpng.

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Integer overflow in gdImageCreateTrueColor function in the GD Graphics Library (libgd) before 2.0.35 allows user-assisted remote attackers to have unspecified attack vectors and impact.

CWE-190 - Integer Overflow or Wraparound

The gdImageCreateXbm function in the GD Graphics Library (libgd) before 2.0.35 allows user-assisted remote attackers to cause a denial of service (crash) via unspecified vectors involving a gdImageCreate failure.

CWE-476 - NULL Pointer Dereference