Remote code execution in MuPDF

1) Double Free

EUVDB-ID: #VU53600

Risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-3407

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error. A remote attacker can create a specially crafted PDF file, trick the victim into opening it, trigger double free error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

MuPDF: 1.0 - 1.18.0

CPE2.3

• cpe:2.3:a:artifex_software:mupdf:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:artifex_software:mupdf:1.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:artifex_software:mupdf:1.2:*:*:*:*:*:*:*

External links

https://git.ghostscript.com/?p=mupdf.git;h=cee7cefc610d42fd383b3c80c12cbc675443176a
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M44PNYCBL33OD7GC75XNE6CDS4VSGVWO/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LCADE3VSPWCGTE5BV4KL273R5VK3GDKM/
https://lists.debian.org/debian-lts-announce/2021/03/msg00012.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZLC6MPH7YS6JPU427XOFRLF3KKZQUZJN/
https://security.gentoo.org/glsa/202105-30

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.