The version of ghostscript installed on the remote host is prior to 9.25-5. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2021-1598 advisory.

    Artifex Ghostscript before 9.25 allowed a user-writable error exception table, which could be used by     remote attackers able to supply crafted PostScript to potentially overwrite or replace error handlers to     inject code. (CVE-2018-17183)

    Artifex Ghostscript 9.25 and earlier allows attackers to bypass a sandbox protection mechanism via vectors     involving errorhandler setup. NOTE: this issue exists because of an incomplete fix forCVE-2018-17183.
    (CVE-2018-17961)

    Artifex Ghostscript allows attackers to bypass a sandbox protection mechanism by leveraging exposure of     system operators in the saved execution stack in an error object. (CVE-2018-18073)

    Artifex Ghostscript 9.25 and earlier allows attackers to bypass a sandbox protection mechanism via vectors     involving the 1Policy operator. (CVE-2018-18284)

    In Artifex Ghostscript through 9.25, the setpattern operator did not properly validate certain types. A     specially crafted PostScript document could exploit this to crash Ghostscript or, possibly, execute     arbitrary code in the context of the Ghostscript process. This is a type confusion issue because of     failure to check whether the Implementation of a pattern dictionary was a structure type. (CVE-2018-19134)

    An issue was discovered in Artifex Ghostscript before 9.26. LockSafetyParams is not checked correctly if     another device is used. (CVE-2018-19409)

    psi/zdevice2.c in Artifex Ghostscript before 9.26 allows remote attackers to bypass intended access     restrictions because available stack space is not checked when the device remains the same.
    (CVE-2018-19475)

    psi/zicc.c in Artifex Ghostscript before 9.26 allows remote attackers to bypass intended access     restrictions because of a setcolorspace type confusion. (CVE-2018-19476)

    psi/zfjbig2.c in Artifex Ghostscript before 9.26 allows remote attackers to bypass intended access     restrictions because of a JBIG2Decode type confusion. (CVE-2018-19477)

    A flaw was found in the .pdf_hook_DSC_Creator procedure where it did not properly secure its privileged     calls, enabling scripts to bypass `-dSAFER` restrictions. A specially crafted PostScript file could     disable security protection and then have access to the file system, or execute arbitrary commands.
    (CVE-2019-14811)

    A flaw was found in the .setuserparams2 procedure where it did not properly secure its privileged calls,     enabling scripts to bypass `-dSAFER` restrictions. A specially crafted PostScript file could disable     security protection and then have access to the file system, or execute arbitrary commands.
    (CVE-2019-14812)

    A flaw was found in the setsystemparams procedure where it did not properly secure its privileged calls,     enabling scripts to bypass `-dSAFER` restrictions. A specially crafted PostScript file could disable     security protection and then have access to the file system, or execute arbitrary commands.
    (CVE-2019-14813)

    A flaw was found in the .pdfexectoken and other procedures where it did not properly secure its privileged     calls, enabling scripts to bypass `-dSAFER` restrictions. A specially crafted PostScript file could     disable security protection and then have access to the file system, or execute arbitrary commands.
    (CVE-2019-14817)

    A flaw was found in the `.charkeys` procedure, where it did not properly secure its privileged calls,     enabling scripts to bypass `-dSAFER` restrictions. An attacker could abuse this flaw by creating a     specially crafted PostScript file that could escalate privileges within the Ghostscript and access files     outside of restricted areas or execute commands. (CVE-2019-14869)

    It was found that the superexec operator was available in the internal dictionary.  A specially crafted     PostScript file could use this flaw in order to, for example, have access to the file system outside of     the constrains imposed by -dSAFER. (CVE-2019-3835)

    It was found that the forceput operator could be extracted from the DefineResource method. A specially     crafted PostScript file could use this flaw in order to, for example, have access to the file system     outside of the constrains imposed by -dSAFER. (CVE-2019-3838)

    It was found that some privileged operators remained accessible from various places after     theCVE-2019-6116fix. A specially crafted PostScript file could use this flaw in order to, for example,     have access to the file system outside of the constrains imposed by -dSAFER. (CVE-2019-3839)

    It was found that ghostscript could leak sensitive operators on the operand stack when a pseudo-operator     pushes a subroutine. A specially crafted PostScript file could use this flaw to escape the -dSAFER     protection in order to, for example, have access to the file system outside of the SAFER constraints.
    (CVE-2019-6116)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

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Amazon Linux 2 : ghostscript (ALAS-2021-1598)

critical Nessus Plugin ID 146633

Version 1.5