CVE-2018-16323

ReadXBMImage in coders/xbm.c in ImageMagick before 7.0.8-9 leaves data uninitialized when processing an XBM file that has a negative pixel value. If the affected code is used as a library loaded into a process that includes sensitive information, that information sometimes can be leaked via the image data.

Graphicsmagick has been updated to fix several bugs and security issues.

This update for ImageMagick fixes the following issues:

The following security vulnerabilities were fixed:

• CVE-2018-16329: Prevent NULL pointer dereference in the GetMagickProperty function leading to DoS (bsc#1106858)
• CVE-2018-16323: ReadXBMImage left data uninitialized when processing an XBM file that has a negative pixel value. If the affected code was used as a library loaded into a process that includes sensitive information, that information sometimes can be leaked via the image data (bsc#1106855)
• CVE-2018-14434: Fixed a memory leak for a colormap in WriteMPCImage (bsc#1102003)
• CVE-2018-14435: Fixed a memory leak in DecodeImage in coders/pcd.c (bsc#1102007)
• CVE-2018-14436: Fixed a memory leak in ReadMIFFImage in coders/miff.c (bsc#1102005)
• CVE-2018-14437: Fixed a memory leak in parse8BIM in coders/meta.c (bsc#1102004)
• Disable PS, PS2, PS3, XPS and PDF coders in default policy.xml (bsc#1105592)

This update for ImageMagick fixes the following security issues:

• CVE-2018-16413: Prevent heap-based buffer over-read in the PushShortPixel function leading to DoS (bsc#1106989)
• CVE-2018-16329: Prevent NULL pointer dereference in the GetMagickProperty function leading to DoS (bsc#1106858).
• CVE-2018-16328: Prevent NULL pointer dereference exists in the CheckEventLogging function leading to DoS (bsc#1106857).
• CVE-2018-16323: ReadXBMImage left data uninitialized when processing an XBM file that has a negative pixel value. If the affected code was used as a library loaded into a process that includes sensitive information, that information sometimes can be leaked via the image data (bsc#1106855)
• CVE-2018-16642: The function InsertRow allowed remote attackers to cause a denial of service via a crafted image file due to an out-of-bounds write (bsc#1107616)
• CVE-2018-16640: Prevent memory leak in the function ReadOneJNGImage (bsc#1107619)
• CVE-2018-16641: Prevent memory leak in the TIFFWritePhotoshopLayers function (bsc#1107618).
• CVE-2018-16643: The functions ReadDCMImage, ReadPWPImage, ReadCALSImage, and ReadPICTImage did check the return value of the fputc function, which allowed remote attackers to cause a denial of service via a crafted image file (bsc#1107612)
• CVE-2018-16644: Added missing check for length in the functions ReadDCMImage and ReadPICTImage, which allowed remote attackers to cause a denial of service via a crafted image (bsc#1107609)
• CVE-2018-16645: Prevent excessive memory allocation issue in the functions ReadBMPImage and ReadDIBImage, which allowed remote attackers to cause a denial of service via a crafted image file (bsc#1107604)

This update for GraphicsMagick fixes the following security issue:

• CVE-2018-16750: Prevent memory leak in the formatIPTCfromBuffer function (bsc#1108283)
• CVE-2018-16323: ReadXBMImage left data uninitialized when processing an XBM file that has a negative pixel value. If the affected code was used as a library loaded into a process that includes sensitive information, that information sometimes can be leaked via the image data (bsc#1106855)
• CVE-2018-16640: Prevent memory leak in the function ReadOneJNGImage (bsc#1107619).
• CVE-2018-16642: The function InsertRow allowed remote attackers to cause a denial of service via a crafted image file due to an out-of-bounds write (bsc#1107616).
• CVE-2018-16643: The functions ReadDCMImage, ReadPWPImage, ReadCALSImage, and ReadPICTImage did check the return value of the fputc function, which allowed remote attackers to cause a denial of service via a crafted image file (bsc#1107612).
• CVE-2018-16644: Added missing check for length in the functions ReadDCMImage and ReadPICTImage, which allowed remote attackers to cause a denial of service via a crafted image (bsc#1107609).
• CVE-2018-16645: Prevent excessive memory allocation issue in the functions ReadBMPImage and ReadDIBImage, which allowed remote attackers to cause a denial of service via a crafted image file (bsc#1107604).
• CVE-2018-18024: Fixed an infinite loop in the ReadBMPImage function of the coders/bmp.c file. Remote attackers could leverage this vulnerability to cause a denial of service via a crafted bmp file. (bsc#1111069)
• CVE-2018-18016: Fixed a memory leak in WritePCXImage (bsc#1111072).
• CVE-2018-17965: Fixed a memory leak in WriteSGIImage (bsc#1110747).
• CVE-2018-17966: Fixed a memory leak in WritePDBImage (bsc#1110746).
• CVE-2018-16749: A missing NULL check in ReadOneJNGImage allowed remote attackers to cause a denial of service (WriteBlob assertion failure and application exit) via a crafted file. (bsc#1108282)

This update for ImageMagick fixes the following security issue:

• CVE-2017-17934: Prevent memory leaks, related to MSLPopImage and ProcessMSLScript, and associated with mishandling of MSLPushImage calls (bsc#1074170).
• CVE-2018-16750: Prevent memory leak in the formatIPTCfromBuffer function (bsc#1108283)
• CVE-2018-16749: Added missing NULL check in ReadOneJNGImage that allowed an attacker to cause a denial of service (WriteBlob assertion failure and application exit) via a crafted file (bsc#1108282)
• CVE-2018-16413: Prevent heap-based buffer over-read in the PushShortPixel function leading to DoS (bsc#1106989).
• CVE-2018-16323: ReadXBMImage left data uninitialized when processing an XBM file that has a negative pixel value. If the affected code was used as a library loaded into a process that includes sensitive information, that information sometimes can be leaked via the image data (bsc#1106855)
• CVE-2018-16642: The function InsertRow allowed remote attackers to cause a denial of service via a crafted image file due to an out-of-bounds write (bsc#1107616)
• CVE-2018-16643: The functions ReadDCMImage, ReadPWPImage, ReadCALSImage, and ReadPICTImage did check the return value of the fputc function, which allowed remote attackers to cause a denial of service via a crafted image file (bsc#1107612)
• CVE-2018-16644: Added missing check for length in the functions ReadDCMImage and ReadPICTImage, which allowed remote attackers to cause a denial of service via a crafted image (bsc#1107609)
• CVE-2018-16645: Prevent excessive memory allocation issue in the functions ReadBMPImage and ReadDIBImage, which allowed remote attackers to cause a denial of service via a crafted image file (bsc#1107604)
• CVE-2018-18024: Fixed an infinite loop in the ReadBMPImage function of the coders/bmp.c file. Remote attackers could leverage this vulnerability to cause a denial of service via a crafted bmp file (bsc#1111069)
• CVE-2018-18016: Fixed a memory leak in WritePCXImage (bsc#1111072)
• CVE-2018-17965: Fixed a memory leak in WriteSGIImage (bsc#1110747)
• CVE-2018-17966: Fixed a memory leak in WritePDBImage (bsc#1110746)

Due to a large number of issues discovered in GhostScript that prevent it from being used by ImageMagick safely, this update includes a default policy change that disables support for the Postscript and PDF formats in ImageMagick. This policy can be overridden if necessary by using an alternate ImageMagick policy configuration.

It was discovered that several memory leaks existed when handling certain images in ImageMagick. An attacker could use this to cause a denial of service. (CVE-2018-14434, CVE-2018-14435, CVE-2018-14436, CVE-2018-14437, CVE-2018-16640, CVE-2018-16750)

It was discovered that ImageMagick did not properly initialize a variable before using it when processing MAT images. An attacker could use this to cause a denial of service or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-14551)

It was discovered that an information disclosure vulnerability existed in ImageMagick when processing XBM images. An attacker could use this to expose sensitive information. (CVE-2018-16323)

It was discovered that an out-of-bounds write vulnerability existed in ImageMagick when handling certain images. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2018-16642)

It was discovered that ImageMagick did not properly check for errors in some situations. An attacker could use this to cause a denial of service. (CVE-2018-16643)

It was discovered that ImageMagick did not properly validate image meta data in some situations. An attacker could use this to cause a denial of service. (CVE-2018-16644)

It was discovered that ImageMagick did not prevent excessive memory allocation when handling certain image types. An attacker could use this to cause a denial of service. (CVE-2018-16645)

Sergej Schumilo and Cornelius Aschermann discovered that ImageMagick did not properly check for NULL in some situations when processing PNG images. An attacker could use this to cause a denial of service. (CVE-2018-16749)

USN-3681-1 fixed vulnerabilities in Imagemagick. Unfortunately, the fix for CVE-2017-13144 introduced a regression in ImageMagick in Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. This update reverts the fix for CVE-2017-13144 for those releases.

We apologize for the inconvenience.

It was discovered that ImageMagick incorrectly handled certain malformed image files. If a user or automated system using ImageMagick were tricked into opening a specially crafted image, an attacker could exploit this to cause a denial of service or possibly execute code with the privileges of the user invoking the program.

Due to a large number of issues discovered in GhostScript that prevent it from being used by ImageMagick safely, the update for Ubuntu 18.10 and Ubuntu 19.04 includes a default policy change that disables support for the Postscript and PDF formats in ImageMagick. This policy can be overridden if necessary by using an alternate ImageMagick policy configuration.