In QPDF 8.2.1, in libqpdf/QPDFWriter.cc, QPDFWriter::unparseObject and QPDFWriter::unparseChild have recursive calls for a long time, which allows remote attackers to cause a denial of service via a crafted PDF file.

The remote Redhat Enterprise Linux 8 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - qpdf: Heap use after free in Pl_ASCII85Decoder::write (CVE-2021-25786)

  - qpdf: heap-based buffer overflow in Pl_ASCII85Decoder::write() when a certain downstream write fails     (CVE-2021-36978)

  - In QPDF 8.2.1, in libqpdf/QPDFWriter.cc, QPDFWriter::unparseObject and QPDFWriter::unparseChild have     recursive calls for a long time, which allows remote attackers to cause a denial of service via a crafted     PDF file. (CVE-2018-18020)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3548 advisory.

  - In QPDF 8.2.1, in libqpdf/QPDFWriter.cc, QPDFWriter::unparseObject and QPDFWriter::unparseChild have     recursive calls for a long time, which allows remote attackers to cause a denial of service via a crafted     PDF file. (CVE-2018-18020)

  - An issue was discovered in QPDF version 10.0.4, allows remote attackers to execute arbitrary code via     crafted .pdf file to Pl_ASCII85Decoder::write parameter in libqpdf. (CVE-2021-25786)

  - QPDF 9.x through 9.1.1 and 10.x through 10.0.4 has a heap-based buffer overflow in     Pl_ASCII85Decoder::write (called from Pl_AES_PDF::flush and Pl_AES_PDF::finish) when a certain downstream     write fails. (CVE-2021-36978)

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

The remote Ubuntu 16.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5026-2 advisory.

    USN-5026-1 fixed several vulnerabilities in QPDF. This update provides the corresponding update for Ubuntu     16.04 ESM.

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.

The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5026-1 advisory.

    It was discovered that QPDF incorrectly handled certain malformed PDF files. A remote attacker could use     this issue to cause QPDF to consume resources, resulting in a denial of service. This issue only affected     Ubuntu 18.04 LTS. (CVE-2018-18020)

    It was discovered that QPDF incorrectly handled certain malformed PDF files. A remote attacker could use     this issue to cause QPDF to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2021-36978)

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 version of the qpdf package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - In QPDF 8.2.1, in libqpdf/QPDFWriter.cc,     QPDFWriter::unparseObject and QPDFWriter::unparseChild     have recursive calls for a long time, which allows     remote attackers to cause a denial of service via a     crafted PDF file.(CVE-2018-18020)

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	Name	Product	Family	Severity
198778	RHEL 8 : qpdf (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	medium
180269	Debian DLA-3548-1 : qpdf - LTS security update	Nessus	Debian Local Security Checks	medium
152178	Ubuntu 16.04 ESM : QPDF vulnerabilities (USN-5026-2)	Nessus	Ubuntu Local Security Checks	medium
152145	Ubuntu 18.04 LTS / 20.04 LTS : QPDF vulnerabilities (USN-5026-1)	Nessus	Ubuntu Local Security Checks	medium
132623	EulerOS 2.0 SP8 : qpdf (EulerOS-SA-2020-1030)	Nessus	Huawei Local Security Checks	low

Detections

Analytics

CVE-2018-18020

low

Tenable Plugins

medium

medium

medium

medium

low