#VU17099 Infinite loop in Cairo - CVE-2019-6462

Vulnerability identifier: #VU17099

Vulnerability risk: Low

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2019-6462

CWE-ID: CWE-835

Exploitation vector: Network

Exploit availability: No

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

Vendor: cairographics

Description

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

The vulnerability exists due to infinite loop in the function _arc_error_normalized in the file cairo-arc.c, related to _arc_max_angle_for_tolerance_normalized. A remote attacker can consume all available system resources and cause denial of service conditions.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Cairo: 1.16.0

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External links
https://github.com/TeamSeri0us/pocs/tree/master/gerbv
https://gitlab.freedesktop.org/cairo/cairo/issues/353

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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. However, proof of concept for this vulnerability is available.