远程主机受到 GLSA-201811-12 中所述漏洞的影响（GPL Ghostscript：多个漏洞）在 GPL Ghostscript 中发现多个漏洞。请检查下面引用的 CVE 标识符以了解详细信息。影响：环境相关的攻击者可引诱用户使用 GPL Ghostscript 打开特别构建的 PostScript 文件或 PDF 文档，从而可能导致以进程的权限执行任意代码、拒绝服务情况或产生其他不明影响，变通方案：目前无任何已知的变通方案。

来自 Red Hat 安全公告 2018:3650：

ghostscript 的更新现在可用于 Red Hat Enterprise Linux 7。

Red Hat 产品安全团队将此更新评级为具有重要安全影响。可从“参考”部分中的 CVE 链接获取通用漏洞评分系统 (CVSS) 基本分数，其针对每个漏洞给出了详细的严重性等级。

Ghostscript 套件包含用于渲染 PostScript 和 PDF 文档的实用工具。Ghostscript 可将 PostScript 代码转换成通用 bitmap 格式，使代码可以显示或打印。

安全修复：

* ghostscript：.tempfile 文件权限问题 (699657) (CVE-2018-15908)

* ghostscript：shading_param 类型检查不完整 (699660) (CVE-2018-15909)

* ghostscript：类型检查器中缺少类型检查 (699659) (CVE-2018-16511)

* ghostscript：临时文件处理中的不正确访问检查会泄露文件内容 (699658) (CVE-2018-16539)

有关此安全问题的详细信息，包括其影响、CVSS 分数和其他相关信息，请参阅列于“参考”部分的 CVE 页面。

Red Hat 在此感谢 Tavis Ormandy (Google Project Zero) 报告 CVE-2018-15908。

ghostscript 更新现可用于 Red Hat Enterprise Linux 7。Red Hat 产品安全团队将此更新评级为具有重要安全影响。可从“参考”部分中的 CVE 链接获取通用漏洞评分系统 (CVSS) 基本分数，其针对每个漏洞给出了详细的严重性等级。Ghostscript 套件包含用于渲染 PostScript 和 PDF 文档的实用工具。Ghostscript 可将 PostScript 代码转换成普通 bitmap 格式，使代码可以显示或打印。安全修复：* ghostscript：.Tempfile 文件权限问题 (699657) (CVE-2018-15908) * ghostscript：shading_param 类型检查不完整 (699660) (CVE-2018-15909) * ghostscript：在类型检查器中缺少类型检查 (699659) (CVE-2018-16511) * ghostscript：临时文件处理中的访问权限检查不正确，会泄露文件内容 (699658) (CVE-2018-16539) 有关此安全问题的详细信息，包括其影响、CVSS 分数和其他相关信息，请参阅列于“参考”部分的 CVE 页面。Red Hat 在此感谢 Tavis Ormandy (Google Project Zero) 报告 CVE-2018-15908。

The version of Artifex Ghostscript installed on the remote Windows host is prior to 9.24. It is, therefore, affected by multiple vulnerabilities due to improperly handling PostScript data. A context-dependent attacker could cause a buffer overflow, potentially crashing the service.

Tavis Ormandy discovered multiple security issues in Ghostscript. If a user or automated system were tricked into processing a specially crafted file, a remote attacker could possibly use these issues to access arbitrary files, execute arbitrary code, or cause a denial of service.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for ghostscript to version 9.25 fixes the following issues :

These security issues were fixed :

  - CVE-2018-17183: Remote attackers were be able to supply     crafted PostScript to potentially overwrite or replace     error handlers to inject code (bsc#1109105)

  - CVE-2018-15909: Prevent type confusion using the .shfill     operator that could have been used by attackers able to     supply crafted PostScript files to crash the interpreter     or potentially execute code (bsc#1106172).

  - CVE-2018-15908: Prevent attackers that are able to     supply malicious PostScript files to bypass .tempfile     restrictions and write files (bsc#1106171).

  - CVE-2018-15910: Prevent a type confusion in the     LockDistillerParams parameter that could have been used     to crash the interpreter or execute code (bsc#1106173).

  - CVE-2018-15911: Prevent use uninitialized memory access     in the aesdecode operator that could have been used to     crash the interpreter or potentially execute code     (bsc#1106195).

  - CVE-2018-16513: Prevent a type confusion in the setcolor     function that could have been used to crash the     interpreter or possibly have unspecified other impact     (bsc#1107412).

  - CVE-2018-16509: Incorrect 'restoration of privilege'     checking during handling of /invalidaccess exceptions     could be have been used by attackers able to supply     crafted PostScript to execute code using the 'pipe'     instruction (bsc#1107410).

  - CVE-2018-16510: Incorrect exec stack handling in the     'CS' and 'SC' PDF primitives could have been used by     remote attackers able to supply crafted PDFs to crash     the interpreter or possibly have unspecified other     impact (bsc#1107411).

  - CVE-2018-16542: Prevent attackers able to supply crafted     PostScript files from using insufficient interpreter     stack-size checking during error handling to crash the     interpreter (bsc#1107413).

  - CVE-2018-16541: Prevent attackers able to supply crafted     PostScript files from using incorrect free logic in     pagedevice replacement to crash the interpreter     (bsc#1107421).

  - CVE-2018-16540: Prevent use-after-free in copydevice     handling that could have been used to crash the     interpreter or possibly have unspecified other impact     (bsc#1107420).

  - CVE-2018-16539: Prevent attackers able to supply crafted     PostScript files from using incorrect access checking in     temp file handling to disclose contents of files on the     system otherwise not readable (bsc#1107422).

  - CVE-2018-16543: gssetresolution and gsgetresolution     allowed attackers to have an unspecified impact     (bsc#1107423).

  - CVE-2018-16511: A type confusion in 'ztype' could have     been used by remote attackers able to supply crafted     PostScript to crash the interpreter or possibly have     unspecified other impact (bsc#1107426).

  - CVE-2018-16585: The .setdistillerkeys PostScript command     was accepted even though it is not intended for use     during document processing (e.g., after the startup     phase). This lead to memory corruption, allowing remote     attackers able to supply crafted PostScript to crash the     interpreter or possibly have unspecified other impact     (bsc#1107581).

  - CVE-2018-16802: Incorrect 'restoration of privilege'     checking when running out of stack during exception     handling could have been used by attackers able to     supply crafted PostScript to execute code using the     'pipe' instruction. This is due to an incomplete fix for     CVE-2018-16509 (bsc#1108027).

These non-security issues were fixed :

  - Fixes problems with argument handling, some unintended     results of the security fixes to the SAFER file access     restrictions (specifically accessing ICC profile files).

  - Avoid that ps2epsi fails with 'Error: /undefined in
    --setpagedevice--'

For additional changes please check http://www.ghostscript.com/doc/9.25/News.htm

This update was imported from the SUSE:SLE-15:Update update project.

This update for ghostscript to version 9.25 fixes the following issues :

These security issues were fixed :

CVE-2018-17183: Remote attackers were be able to supply crafted PostScript to potentially overwrite or replace error handlers to inject code (bsc#1109105)

CVE-2018-15909: Prevent type confusion using the .shfill operator that could have been used by attackers able to supply crafted PostScript files to crash the interpreter or potentially execute code (bsc#1106172).

CVE-2018-15908: Prevent attackers that are able to supply malicious PostScript files to bypass .tempfile restrictions and write files (bsc#1106171).

CVE-2018-15910: Prevent a type confusion in the LockDistillerParams parameter that could have been used to crash the interpreter or execute code (bsc#1106173).

CVE-2018-15911: Prevent use uninitialized memory access in the aesdecode operator that could have been used to crash the interpreter or potentially execute code (bsc#1106195).

CVE-2018-16513: Prevent a type confusion in the setcolor function that could have been used to crash the interpreter or possibly have unspecified other impact (bsc#1107412).

CVE-2018-16509: Incorrect 'restoration of privilege' checking during handling of /invalidaccess exceptions could be have been used by attackers able to supply crafted PostScript to execute code using the 'pipe' instruction (bsc#1107410).

CVE-2018-16510: Incorrect exec stack handling in the 'CS' and 'SC' PDF primitives could have been used by remote attackers able to supply crafted PDFs to crash the interpreter or possibly have unspecified other impact (bsc#1107411).

CVE-2018-16542: Prevent attackers able to supply crafted PostScript files from using insufficient interpreter stack-size checking during error handling to crash the interpreter (bsc#1107413).

CVE-2018-16541: Prevent attackers able to supply crafted PostScript files from using incorrect free logic in pagedevice replacement to crash the interpreter (bsc#1107421).

CVE-2018-16540: Prevent use-after-free in copydevice handling that could have been used to crash the interpreter or possibly have unspecified other impact (bsc#1107420).

CVE-2018-16539: Prevent attackers able to supply crafted PostScript files from using incorrect access checking in temp file handling to disclose contents of files on the system otherwise not readable (bsc#1107422).

CVE-2018-16543: gssetresolution and gsgetresolution allowed attackers to have an unspecified impact (bsc#1107423).

CVE-2018-16511: A type confusion in 'ztype' could have been used by remote attackers able to supply crafted PostScript to crash the interpreter or possibly have unspecified other impact (bsc#1107426).

CVE-2018-16585: The .setdistillerkeys PostScript command was accepted even though it is not intended for use during document processing (e.g., after the startup phase). This lead to memory corruption, allowing remote attackers able to supply crafted PostScript to crash the interpreter or possibly have unspecified other impact (bsc#1107581).

CVE-2018-16802: Incorrect 'restoration of privilege' checking when running out of stack during exception handling could have been used by attackers able to supply crafted PostScript to execute code using the 'pipe' instruction. This is due to an incomplete fix for CVE-2018-16509 (bsc#1108027).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has ghostscript packages installed that are affected by multiple vulnerabilities:

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

  - It was discovered that the ghostscript .tempfile     function did not properly handle file permissions. An     attacker could possibly exploit this to exploit this to     bypass the -dSAFER protection and delete files or     disclose their content via a specially crafted     PostScript document. (CVE-2018-15908)

  - An issue was discovered in Artifex Ghostscript before     9.25. Incorrect restoration of privilege checking when     running out of stack during exception handling could be     used by attackers able to supply crafted PostScript to     execute code using the pipe instruction. This is due     to an incomplete fix for CVE-2018-16509.
    (CVE-2018-16802)

  - It was discovered that the ghostscript device cleanup     did not properly handle devices replaced with a null     device. An attacker could possibly exploit this to     bypass the -dSAFER protection and crash ghostscript or,     possibly, execute arbitrary code in the ghostscript     context via a specially crafted PostScript document.
    (CVE-2018-16541)

  - It was discovered that ghostscript did not properly     verify the key used in aesdecode. An attacker could     possibly exploit this to bypass the -dSAFER protection     and crash ghostscript or, possibly, execute arbitrary     code in the ghostscript context via a specially crafted     PostScript document. (CVE-2018-15911)

  - It was discovered that the ghostscript did not properly     restrict access to files open prior to enabling the
    -dSAFER mode. An attacker could possibly exploit this to     bypass the -dSAFER protection and disclose the content     of affected files via a specially crafted PostScript     document. (CVE-2018-16539)

  - 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 for CVE-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)

  - It was found that RHSA-2018:2918 did not fully fix     CVE-2018-16509. An attacker could possibly exploit     another variant of the flaw and bypass the -dSAFER     protection to, for example, execute arbitrary shell     commands via a specially crafted PostScript document.
    (CVE-2018-16863)

  - 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)

  - It was discovered that the ghostscript .shfill operator     did not properly validate certain types. An attacker     could possibly exploit this to bypass the -dSAFER     protection and crash ghostscript or, possibly, execute     arbitrary code in the ghostscript context via a     specially crafted PostScript document. (CVE-2018-15909)

  - It was discovered that the ghostscript .type operator     did not properly validate its operands. A specially     crafted PostScript document could exploit this to crash     ghostscript or, possibly, execute arbitrary code in the     context of the ghostscript process. (CVE-2018-16511)

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

Tavis Ormandy 发现，PostScript 语言解释器 Ghostscript 中存在多个漏洞，如果处理格式错误的 Postscript 文件，可导致拒绝服务、创建文件或任意代码执行（尽管已启用 dSAFER 沙盒）。对于 Debian 8“Jessie”，这些问题已在 9.06~dfsg-2+deb8u8 版本中修复。我们建议您升级 ghostscript 程序包。注意：Tenable Network Security 已直接从 DLA 安全公告中提取上述描述块。Tenable 已尝试在不引入其他问题的情况下，尽可能进行自动整理和排版。

发现 ghostscript .shfill 操作符未能正确验证某些类型。攻击者可利用此问题绕过 -dSAFER 保护并导致 ghostscript 崩溃，或可能通过特制的 PostScript 文档在 ghostscript 环境上执行任意代码。(CVE-2018-15909) 发现 9.24 之前的 Artifex Ghostscript 存在问题。远程攻击者可利用 'ztype' 中的类型混淆提供特制的 PostScript 导致解释器崩溃或可能造成其它不明影响。(CVE-2018-16511) 发现在 9.24 之前的 Artifex Ghostscript 存在问题。即使在文档处理期间不打算使用 setdistillerkeys PostScript 命令，其也会被接受（如在启动阶段之后）。这可导致内存损坏，从而允许远程攻击者可提供特制的 PostScript 导致解释器崩溃或可能造成其它不明影响。(CVE-2018-16585) 发现 ghostscript PDF14 合成器未能正确处理设备的复制。攻击者可利用此问题绕过 -dSAFER 保护并导致 ghostscript 崩溃，或可能通过特制的 PostScript 文档在 ghostscript 环境上执行任意代码。(CVE-2018-16540) 发现 ghostscript 设备清理未能正确处理替换为空设备的设备。攻击者可利用此问题绕过 -dSAFER 保护并导致 ghostscript 崩溃，或可能通过特制的 PostScript 文档在 ghostscript 环境上执行任意代码。(CVE-2018-16541) 发现 ghostscript 未能限制对在启用 -dSAFER 模式之前打开文件的访问权限。攻击者可利用此问题绕过 -dSAFER 保护并通过特制的 PostScript 文档泄露受影响的文件内容。(CVE-2018-16539) 发现 9.25 之前的 Artifex Ghostscript 存在问题。攻击者可利用异常处理期间耗尽堆栈时不正确的 'restoration of privilege' 检查提供特制的 PostScript 以使用 'pipe' 指令执行代码。此问题时由对 CVE-2018-16509 不完全修复导致的。(CVE-2018-16802) 发现 ghostscript 未能正确处理某些堆栈溢出错误条件。攻击者可利用此问题绕过 -dSAFER 保护并导致 ghostscript 崩溃，或可能通过特制的 PostScript 文档在 ghostscript 环境上执行任意代码。(CVE-2018-16542) Ghostscript 在执行用于如文件存在和大小检索信息的 'status' 指令时未遵守 -dSAFER 选项。特制的 postscript 文档可利用此缺陷获取目标系统文件系统内容上的信息。(CVE-2018-11645) 发现 ghostscript 未能正确验证传递至 setcolor 函数的操作数。攻击者可利用此问题绕过 -dSAFER 保护并导致 ghostscript 崩溃，或可能通过特制的 PostScript 文档在 ghostscript 环境上执行任意代码。(CVE-2018-16513) 发现 LockDistillerParams 参数类型未正确被验证。攻击者可利用此问题绕过 -dSAFER 保护并导致 ghostscript 崩溃，或可能通过特制的 PostScript 文档在 ghostscript 环境上执行任意代码。(CVE-2018-15910) 发现 在某些条件下 ghostscript /invalidaccess 检查失败。攻击者可利用此问题绕过 -dSAFER 保护，比如通过特制的 PostScript 文档执行任意 shell 命令。(CVE-2018-16509) 发现 ghostscript 未能正确验证 aesdecode 中使用的密钥。攻击者可利用此问题绕过 -dSAFER 保护并导致 ghostscript 崩溃，或可能通过特制的 PostScript 文档在 ghostscript 环境中执行任意代码。(CVE-2018-15911) 发现 ghostscript .tempfile 函数未能正确处理文件权限。攻击者可利用此问题绕过 -dSAFER 保护并通过特制的 PostScript 文档删除文件或泄露其内容。(CVE-2018-15908)

ghostscript 的更新现在可用于 Red Hat Enterprise Linux 7。

Red Hat 产品安全团队将此更新评级为具有重要安全影响。可从“参考”部分中的 CVE 链接获取通用漏洞评分系统 (CVSS) 基本分数，其针对每个漏洞给出了详细的严重性等级。

Ghostscript 套件包含用于渲染 PostScript 和 PDF 文档的实用工具。Ghostscript 可将 PostScript 代码转换成通用 bitmap 格式，使代码可以显示或打印。

安全修复：

* ghostscript：.tempfile 文件权限问题 (699657) (CVE-2018-15908)

* ghostscript：shading_param 类型检查不完整 (699660) (CVE-2018-15909)

* ghostscript：类型检查器中缺少类型检查 (699659) (CVE-2018-16511)

* ghostscript：临时文件处理中的不正确访问检查会泄露文件内容 (699658) (CVE-2018-16539)

有关此安全问题的详细信息，包括其影响、CVSS 分数和其他相关信息，请参阅列于“参考”部分的 CVE 页面。

Red Hat 在此感谢 Tavis Ormandy (Google Project Zero) 报告 CVE-2018-15908。

ID	名前	製品	ファミリー	公開日	更新日	深刻度
119132	GLSA-201811-12：GPL Ghostscript：多个漏洞	Nessus	Gentoo Local Security Checks	2018/11/26	2022/5/31	critical
119166	Oracle Linux 7：ghostscript (ELSA-2018-3650)	Nessus	Oracle Linux Local Security Checks	2018/11/27	2020/7/8	high
119661	CentOS 7 : ghostscript (CESA-2018:3650)	Nessus	CentOS Local Security Checks	2018/12/14	2020/4/8	high
117459	Artifex Ghostscript Multiple Vulnerabilities	Nessus	Windows	2018/9/12	2020/4/27	high
117595	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : Ghostscript vulnerabilities (USN-3768-1)	Nessus	Ubuntu Local Security Checks	2018/9/19	2023/10/20	high
117980	openSUSE Security Update : ghostscript (openSUSE-2018-1123)	Nessus	SuSE Local Security Checks	2018/10/9	2021/1/19	high
120116	SUSE SLED15 / SLES15 Security Update : ghostscript (SUSE-SU-2018:2976-1)	Nessus	SuSE Local Security Checks	2019/1/2	2021/1/13	high
127227	NewStart CGSL CORE 5.04 / MAIN 5.04 : ghostscript Multiple Vulnerabilities (NS-SA-2019-0046)	Nessus	NewStart CGSL Local Security Checks	2019/8/12	2022/5/19	critical
117487	Debian DLA-1504-1：ghostscript 安全更新	Nessus	Debian Local Security Checks	2018/9/14	2021/1/11	high
118043	Amazon Linux 2 : ghostscript (ALAS-2018-1088)	Nessus	Amazon Linux Local Security Checks	2018/10/11	2019/7/10	high
119168	RHEL 7：ghostscript (RHSA-2018: 3650)	Nessus	Red Hat Local Security Checks	2018/11/27	2024/4/27	high

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