#VU36049 Resource exhaustion in graphviz - CVE-2019-9904

Vulnerability identifier: #VU36049

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-9904

CWE-ID: CWE-400

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 non-authenticated attacker to perform a denial of service (DoS) attack.

An issue was discovered in libcdtdttree.c in libcdt.a in graphviz 2.40.1. Stack consumption occurs because of recursive agclose calls in libcgraphgraph.c in libcgraph.a, related to agfstsubg in libcgraphsubg.c.

Mitigation
Install update from vendor's website.

Vulnerable software versions

graphviz: 2.40.1

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External links
https://gitlab.com/graphviz/graphviz/issues/1512
https://research.loginsoft.com/bugs/stack-buffer-overflow-in-function-agclose-graphviz/

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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.