#VU79770 NULL pointer dereference in Poppler - CVE-2020-36024

Vulnerability identifier: #VU79770

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-36024

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Poppler
Client/Desktop applications / Office applications

Vendor: Freedesktop.org

Description

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

The vulnerability exists due to a NULL pointer dereference error within the FoFiType1C::convertToType1() function. A remote attacker can pass specially crafted PDF file to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Poppler: 20.08.0 - 20.12.1

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External links
https://gitlab.freedesktop.org/poppler/poppler/-/issues/1016
https://lists.debian.org/debian-lts-announce/2023/08/msg00017.html

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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.