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Vulnerability of Artifex MuPDF: buffer overflow via JBIG2

Synthesis of the vulnerability 

An attacker can trigger a buffer overflow via JBIG2 of Artifex MuPDF, in order to trigger a denial of service, and possibly to run code.
Vulnerable products: Debian, Fedora.
Severity of this weakness: 2/4.
Creation date: 26/10/2020.
Références of this bulletin: CVE-2020-26519, DLA-2589-1, DLA-2589-2, DSA-4794-1, FEDORA-2020-3cea1ac8f3, VIGILANCE-VUL-33684.

Description of the vulnerability 

An attacker can trigger a buffer overflow via JBIG2 of Artifex MuPDF, in order to trigger a denial of service, and possibly to run code.
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This threat bulletin impacts software or systems such as Debian, Fedora.

Our Vigil@nce team determined that the severity of this computer threat bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this computer threat.

Solutions for this threat 

Debian 10: new mupdf packages.
New packages are available:
  Debian 10: mupdf 1.14.0+ds1-4+deb10u2

Debian 9: new mupdf packages.
New packages are available:
  Debian 9: mupdf 1.9a+ds1-4+deb9u7

Fedora 32: new mupdf packages.
New packages are available:
  Fedora 32: mupdf 1.18.0-2.fc32

Fedora 32: new python-PyMuPDF packages.
New packages are available:
  Fedora 32: python-PyMuPDF 1.18.0-1.fc32

Fedora 32: new zathura-pdf-mupdf packages.
New packages are available:
  Fedora 32: zathura-pdf-mupdf 0.3.6-4.fc32
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