#VU18637 NULL pointer dereference in graphviz - CVE-2019-11023

Vulnerability identifier: #VU18637

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-11023

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
graphviz
Universal components / Libraries / Libraries used by multiple products

Vendor: The Graphviz Project

Description

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

The vulnerability exists due to a NULL pointer dreference error in the agroot() function within cgraphobj.c of the libcgraph.a. A remote attacker can pass specially crafted GraphML input to the affected application and perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

graphviz: 2.39

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External links
https://gitlab.com/graphviz/graphviz/issues/1517
https://research.loginsoft.com/bugs/null-pointer-dereference-in-function-agroot/

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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.