Out-of-bounds read in MuPDF

1) Out-of-bounds read

EUVDB-ID: #VU35636

Risk: Medium

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-14975

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to heap-based buffer over-read in fz_chartorune in fitz/string.c because pdf/pdf-op-filter.c does not check for a missing string. A remote attacker can perform a denial of service attack.

Mitigation

Update to version 1.16.0.

Vulnerable software versions

MuPDF: 1.0 - 1.15.0 rc1

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:1.1:*:*:*:*:*:*:*

External links

https://git.ghostscript.com/?p=mupdf.git;a=commit;h=97096297d409ec6f206298444ba00719607e8ba8
https://bugs.ghostscript.com/show_bug.cgi?id=701292

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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