发现 QPDF 未能正确处理某些畸形的文件。远程攻击者可以利用此问题导致 QPDF 崩溃，从而导致拒绝服务或执行任意代码。

请注意，Tenable Network Security 已直接从 Ubuntu 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，尽可能进行自动清理和排版。

據發現，QPDF 未正確處理某些格式錯誤的檔案。遠端攻擊者可利用此問題造成 QPDF 損毀，進而導致拒絕服務，或可能執行任意程式碼。

請注意，Tenable Network Security 已直接從 Ubuntu 安全性公告擷取前置描述區塊。Tenable 已盡量在不造成其他問題的前提下，嘗試自動清理並將其格式化。

QPDFが、特定の不正な形式のファイルを不適切に処理することが判明しました。リモートの攻撃者がこの問題を悪用してQPDFをクラッシュさせ、サービス拒否を引き起こしたり、任意のコードを実行する可能性があります。

注意: Tenable Network Security は、前述の説明ブロックを Ubuntu セキュリティアドバイザリからすでに直接抽出しています。Tenable では、新たな問題を持ち込まずに、できる限り自動的に整理して書式設定するようにしています。

The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3638-1 advisory.

    It was discovered that QPDF incorrectly handled certain malformed files. A remote attacker could use this     issue to cause QPDF to crash, resulting in a denial of service, or possibly execute arbitrary code.

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

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

According to the versions of the qpdf package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in QPDF before 7.0.0. There is     an infinite loop due to looping xref tables in     QPDF.cc.(CVE-2017-18186)

  - libqpdf.a in QPDF 6.0.0 allows remote attackers to     cause a denial of service (infinite recursion and stack     consumption) via a crafted PDF document, related to     unparse functions, aka     qpdf-infiniteloop3.(CVE-2017-9210)

  - libqpdf.a in QPDF 6.0.0 allows remote attackers to     cause a denial of service (infinite recursion and stack     consumption) via a crafted PDF document, related to     QPDFObjectHandle::parseInternal, aka     qpdf-infiniteloop2.(CVE-2017-9209)

  - libqpdf.a in QPDF 6.0.0 allows remote attackers to     cause a denial of service (infinite recursion and stack     consumption) via a crafted PDF document, related to     releaseResolved functions, aka     qpdf-infiniteloop1.(CVE-2017-9208)

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

According to the versions of the qpdf package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in QPDF before 7.0.0. Endless     recursion causes stack exhaustion in     QPDFTokenizer::resolveLiteral() in QPDFTokenizer.cc,     related to the QPDF::resolve function in     QPDF.cc.(CVE-2015-9252)

  - An issue was discovered in QPDF before 7.0.0. There is     an infinite loop due to looping xref tables in     QPDF.cc.(CVE-2017-18186)

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
109600	Ubuntu 14.04 LTS / 16.04 LTS：QPDF 漏洞 (USN-3638-1)	Nessus	Ubuntu Local Security Checks	2018/5/8	2024/8/27	high
109600	Ubuntu 14.04 LTS / 16.04 LTS：QPDF 弱點 (USN-3638-1)	Nessus	Ubuntu Local Security Checks	2018/5/8	2024/8/27	high
109600	Ubuntu 14.04 LTS / 16.04 LTS : QPDFの脆弱性 (USN-3638-1)	Nessus	Ubuntu Local Security Checks	2018/5/8	2024/8/27	high
109600	Ubuntu 14.04 LTS / 16.04 LTS : QPDF vulnerabilities (USN-3638-1)	Nessus	Ubuntu Local Security Checks	2018/5/8	2024/8/27	high
153336	EulerOS 2.0 SP2 : qpdf (EulerOS-SA-2021-2442)	Nessus	Huawei Local Security Checks	2021/9/14	2021/9/16	medium
132190	EulerOS 2.0 SP3 : qpdf (EulerOS-SA-2019-2655)	Nessus	Huawei Local Security Checks	2019/12/18	2024/4/3	medium

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