In Artifex MuPDF 1.13.0, the fz_append_byte function in fitz/buffer.c allows remote attackers to cause a denial of service (segmentation fault) via a crafted pdf file. This is caused by a pdf/pdf-device.c pdf_dev_alpha array-index underflow.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7825-1 advisory.

    It was discovered that MuPDF incorrectly managed memory, resulting in a memory leak. An attacker could     possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS.
    (CVE-2018-1000036)

    It was discovered that MuPDF could enter an infinite loop when parsing certain PDF files. An attacker     could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS.
    (CVE-2018-10289)

    It was discovered that MuPDF incorrectly managed memory, possibly leading to a segmentation fault. An     attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04     LTS. (CVE-2018-16647, CVE-2018-16648)

    It was discovered that MuPDF contained a use-after-free vulnerability. An attacker could possibly use this     issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.
    (CVE-2020-21896)

    It was discovered that MuPDF incorrectly managed memory, resulting in a memory leak. An attacker could     possibly use this issue to cause a denial of service or obtain sensitive information. This issue only     affected Ubuntu 20.04 LTS. (CVE-2020-26683)

    Maxim Mishechkin, Vitalii Akolzin, Shamil Kurmangaleev, Denis Straghkov, Fedor Nis'kov and Ivan Gulakov     discovered that MuPDF incorrectly managed memory under certain circumstances, leading to a double-free. An     attacker could possibly use this to cause a denial of service. This issue only affected Ubuntu 16.04 LTS,     Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-3407)

    Xuwei Liu discovered that MuPDF may perform an out-of-bounds write under certain circumstances. An     attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04     LTS and Ubuntu 20.04 LTS. (CVE-2021-37220)

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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - In Artifex MuPDF 1.13.0, the fz_append_byte function in fitz/buffer.c allows remote attackers to cause a     denial of service (segmentation fault) via a crafted pdf file. This is caused by a pdf/pdf-device.c     pdf_dev_alpha array-index underflow. (CVE-2018-16648)

Note that Nessus relies on the presence of the package as reported by the vendor.

Several issues have been found in mupdf, a lightweight PDF viewer.

The issues could be exploited by crafted PDF files that result in denial of service by heap-based buffer overflows, segmentation faults or out of bound reads.

For Debian 9 stretch, these problems have been fixed in version 1.9a+ds1-4+deb9u5.

We recommend that you upgrade your mupdf packages.

For the detailed security status of mupdf please refer to its security tracker page at: https://security-tracker.debian.org/tracker/mupdf

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

rebase and bugfixes

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

ID	Name	Product	Family	Severity
270675	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : MuPDF vulnerabilities (USN-7825-1)	Nessus	Ubuntu Local Security Checks	medium
253596	Linux Distros Unpatched Vulnerability : CVE-2018-16648	Nessus	Misc.	medium
138912	Debian DLA-2289-1 : mupdf security update	Nessus	Debian Local Security Checks	high
120623	Fedora 29 : mupdf (2018-93558de1ac)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2018-16648

medium

Tenable Plugins

medium

medium

high

medium