#VU8105 Stack-based buffer overflow in fontforge (Ubuntu package) - CVE-2017-11571

Vulnerability identifier: #VU8105

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-11571

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
fontforge (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor: Canonical Ltd.

Description
The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The weakness exists due to stack-based buffer overflow in addnibble (parsettf.c). A remote attacker can trick the victim into opening a specially crafted otf file and cause the application to crash or execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Update to the latest version.

Vulnerable software versions

fontforge (Ubuntu package): 20161012

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External links
https://github.com/fontforge/fontforge/issues/3123

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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.