Improper input validation in mupdf (Alpine package)

1) Improper input validation

EUVDB-ID: #VU11489

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-6544

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in th pdf_load_obj_stm in pdf/pdf-xref.c due to it can reference the object stream recursively and therefore run out of error stack. A remote attacker can submit a specially crafted PDF document cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

mupdf (Alpine package): 1.12.0-r0

mupdf (Alpine package):

CPE2.3

• cpe:2.3:a:alpine:mupdf_alpine_package:1.12.0-r0:*:*:*:*:alpine_linux:*:3.6
• cpe:2.3:a:alpine:mupdf_alpine_package::*:*:*:*:alpine_linux:*:*

External links

https://git.alpinelinux.org/aports/commit/?id=d9c3c9c209f455ed747c905497cfdbfd57baa2c8
https://git.alpinelinux.org/aports/commit/?id=44edd0a362a97c812a59af6d93f91741ddff47c6
https://git.alpinelinux.org/aports/commit/?id=70bbeef9560773077c355e9816977d9ab61c15c6
https://git.alpinelinux.org/aports/commit/?id=831d2ee24986330048dfa488c8bb5017656e8efd
https://git.alpinelinux.org/aports/commit/?id=f26e75a18613c396b7491f5210d42a45aefa6031

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.