CVE-2016-7979

Ghostscript before 9.21 might allow remote attackers to bypass the SAFER mode protection mechanism and consequently execute arbitrary code by leveraging type confusion in .initialize_dsc_parser.

Ghostscript before 9.21 might allow remote attackers to bypass the SAFER mode protection mechanism and consequently execute arbitrary code by leveraging type confusion in .initialize_dsc_parser.

Various userparams in Ghostscript allow %pipe% in paths, allowing remote shell command execution (CVE-2016-7976).

The .libfile function in Ghostscript doesn't check PermitFileReading array, allowing remote file disclosure (CVE-2016-7977).

Reference leak in the .setdevice function in Ghostscript allows use-after-free and remote code execution (CVE-2016-7978).

Type confusion in the .initialize_dsc_parser function in Ghostscript allows remote code execution (CVE-2016-7979).

The .sethalftone5 function in psi/zht2.c in Ghostscript before 9.21 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted Postscript document that calls .sethalftone5 with an empty operand stack (CVE-2016-8602).

A heap based buffer overflow was found in the ghostscript jbig2_decode_gray_scale_image() function used to decode halftone segments in a JBIG2 image. A document (PostScript or PDF) with an embedded, specially crafted, jbig2 image could trigger a segmentation fault in ghostscript (CVE-2016-9601).

The pdf14_open function in base/gdevp14.c in Ghostscript 9.20 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted file that is mishandled in the color management module (CVE-2016-10217).

The pdf14_pop_transparency_group function in base/gdevp14.c in the PDF Transparency module in Ghostscript 9.20 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted file (CVE-2016-10218).

The intersect function in base/gxfill.c in Ghostscript 9.20 allows remote attackers to cause a denial of service (divide-by-zero error and application crash) via a crafted file (CVE-2016-10219).

The gs_makewordimagedevice function in base/gsdevmem.c in Ghostscript 9.20 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted file that is mishandled in the PDF Transparency module (CVE-2016-10220).

The mem_get_bits_rectangle function in base/gdevmem.c in Ghostscript 9.20 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted file (CVE-2017-5951).

The mem_get_bits_rectangle function in Ghostscript 9.20 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted PostScript document (CVE-2017-7207).

Ghostscript through 2017-04-26 allows -dSAFER bypass and remote command execution via .rsdparams type confusion with a "/OutputFile (%pipe%" substring in a crafted .eps document that is an input to the gs program (CVE-2017-8291).

These are all security issues fixed in the ghostscript-9.20-2.1 package on the GA media of openSUSE Tumbleweed.

This update for ghostscript-library fixes the following issues:

• Multiple security vulnerabilities have been discovered where ghostscript's '-dsafer' flag did not provide sufficient protection against unintended access to the file system. Thus, a machine that would process a specially crafted Postscript file would potentially leak sensitive information to an attacker. (CVE-2013-5653, bsc#1001951)

• An incorrect reference count was found in .setdevice. This issue lead to a use-after-free scenario, which could have been exploited for denial-of-service or, possibly, arbitrary code execution attacks. (CVE-2016-7978, bsc#1001951)

• Insufficient validation of the type of input in .initialize_dsc_parser used to allow remote code execution. (CVE-2016-7979, bsc#1001951)

This update for ghostscript-library fixes the following issues:

• Multiple security vulnerabilities have been discovered where ghostscript's '-dsafer' flag did not provide sufficient protection against unintended access to the file system. Thus, a machine that would process a specially crafted Postscript file would potentially leak sensitive information to an attacker. (CVE-2013-5653, CVE-2016-7977, bsc#1001951)

• Insufficient validation of the type of input in .initialize_dsc_parser used to allow remote code execution. (CVE-2016-7979, bsc#1001951)

• An integer overflow in the gs_heap_alloc_bytes function used to allow remote attackers to cause a denial of service (crash) via specially crafted Postscript files. (CVE-2015-3228, boo#939342)

Tavis Ormandy discovered multiple vulnerabilities in the way that Ghostscript processes certain Postscript files. If a user or automated system were tricked into opening a specially crafted file, an attacker could cause a denial of service or possibly execute arbitrary code. (CVE-2016-7976, CVE-2016-7978, CVE-2016-7979, CVE-2016-8602)

Multiple vulnerabilities were discovered in Ghostscript related to information disclosure. If a user or automated system were tricked into opening a specially crafted file, an attacker could expose sensitive data. (CVE-2013-5653, CVE-2016-7977)