#VU8109 Denial of service in fontforge (Ubuntu package) - CVE-2017-11576

Vulnerability identifier: #VU8109

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-2017-11576

CWE-ID: CWE-20

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 an error when ensuring a positive size in a weight vector memcpy call in readcfftopdict (parsettf.c). A remote attacker can trick the victim into opening a specially crafted otf file and cause the application to crash.

Successful exploitation of the vulnerability results in denial of service.

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.