Out-of-bounds write in MuPDF - CVE-2020-26519

Vulnerability identifier: #VU47952

CSH Severity: Medium

CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-26519

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Artifex MuPDF before 1.18.0 has a heap based buffer over-write when parsing JBIG2 files allowing attackers to cause a denial of service.

MuPDF
Gentoo Linux
Fedora
mupdf (Alpine package)
mupdf (Debian package)
zathura-pdf-mupdf
python-PyMuPDF
mupdf

Install update from vendor's website.

MuPDF - update to 1.18.0
mupdf (Alpine package) - update to 1.17.0-r3
mupdf (Debian package) - update to 1.14.0+ds1-4+deb10u2
zathura-pdf-mupdf - addressed in versions 0.3.6-4.fc32, 0.3.6-4.fc33
python-PyMuPDF - addressed in versions 1.18.0-1.fc32, 1.18.0-1.fc33
mupdf - addressed in versions 1.18.0-2.fc32, 1.18.0-2.fc33

• http://git.ghostscript.com/?p=mupdf.git;a=commit;h=af1e390a2c7abceb32676ec684cd1dbb92907ce8
• https://bugs.ghostscript.com/show_bug.cgi?id=702937
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SOF4PX2A5TGKKPMXINADSOJJ4H5UUMKK/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WJMBKWVY7ZBIQV3EU5YHEFH5XWV4PABG/

• Out-of-bounds write in MuPDF
• Out-of-bounds write in mupdf (Alpine package)
• Debian update for mupdf
• Gentoo update for MuPDF
• Fedora 33 update for mupdf, python-PyMuPDF, zathura-pdf-mupdf
• Fedora 32 update for mupdf, python-PyMuPDF, zathura-pdf-mupdf