Date: Fri, 28 Apr 2017 14:34:38 +0800 From: 李琪 <pjqruc@...il.com> To: oss-security@...ts.openwall.com Subject: CVE-2017-7475 Cairo-1.15.4 Denial-of-Service Attack due to Logical Problem in Program Hello, ## Overview I and my colleague have found a vulnerability of Cairo-1.15.4 when fuzzing HarfBuzz with AFL. Cairo is a 2d graphics library, and HarBuzz is an OpenType text shaping engine which contains a tool named *hb-view* to give a graphical view of text using Cairo with a font provided by user. Owing to logical problem in program, the crash happens during null pointer deference and the vulnerability will cause a denial-of-service attack with a crafted font file. ## Note I have reported this issue to cairo and here is the link: https://bugs.freedesktop.org/show_bug.cgi?id=100763. When I disclosure to Red Hat Product Security, they suggest me to use CVE-2017-7475 for this issue and I have communicated this number to upstream. Best Regards, -- Jiaqi Peng, Bingchang Liu @ VARAS of IIE
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