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Ghostscript before 9.21 might allow remote attackers to bypass the SAFER mode protection mechanism and consequently read arbitrary files via the use of the .libfile operator in a crafted postscript document. Use-after-free vulnerability in Ghostscript 9.20 might allow remote attackers to execute arbitrary code via vectors related to a reference leak in .setdevice. 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. libjbig2dec.a in Artifex jbig2dec 0.13, as used in MuPDF and Ghostscript, has a NULL pointer dereference in the jbig2_huffman_get function in jbig2_huffman.c. For example, the jbig2dec utility will crash (segmentation fault) when parsing an invalid file. References: https://nvd.nist.gov/vuln/detail/CVE-2016-7977 https://nvd.nist.gov/vuln/detail/CVE-2016-7978 https://nvd.nist.gov/vuln/detail/CVE-2016-7979 https://nvd.nist.gov/vuln/detail/CVE-2017-9216 Upstream patches: http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=8abd22010eb4db0fb1b10e430d5f5d83e015ef70 http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=6f749c0c44e7b9e09737b9f29edf29925a34f0cf http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=875a0095f37626a721c7ff57d606a0f95af03913 http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=3ebffb1d96ba0cacec23016eccb4047dab365853 (From OE-Core rev: 584dfa2f780d5785aaff01f84fbabc18b3478d76) Signed-off-by: Catalin Enache <catalin.enache@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>