#VU76078 NULL pointer dereference in graphviz - CVE-2018-10196

Vulnerability identifier: #VU76078

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-10196

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 dereference error in the rebuild_vlists() function in lib/dotgen/conc.c within the dotgen library. A remote attacker can trick the victim to open a specially crafted file and crash the application.

Mitigation
Install update from vendor's website.

Vulnerable software versions

graphviz: 2.40.0 - 2.40.1

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External links
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TWUEEJPMS5LAROYJYY6FREOTI6VPN3M4/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6VR2CT3LD52GWAQUZAOSEXSYE3O7HGN/
https://gitlab.com/graphviz/graphviz/issues/1367
https://bugzilla.redhat.com/show_bug.cgi?id=1579254
https://usn.ubuntu.com/3731-1/
https://lists.debian.org/debian-lts-announce/2021/05/msg00014.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.