CVE:CVE-2015-4486
CNNVD:CNNVD-201508-349
Mozilla Firefox和Firefox ESR都是美国Mozilla基金会开发的浏览器产品。Firefox是一款开源Web浏览器；Firefox ESR是Firefox的一个延长支持版本。libvpx是其中的一个编码解码器。
Mozilla Firefox 40.0之前版本和Firefox ESR 38.2之前38.x版本的libvpx中的‘decrease_ref_count’函数存在安全漏洞。远程攻击者可借助畸形的WebM视频数据利用该漏洞执行任意代码，或造成拒绝服务（越边界读取）。
solution:Upgrade canonical ubuntu_linux to a higher version than 12.04,14.04,15.04,and avoid the version 12.04,14.04,15.04; Upgrade opensuse opensuse to a higher version than 13.1,13.2,and avoid the version 13.1,13.2; Upgrade mozilla firefox to a higher version than 39.0.3,and avoid the version (,39.0.3]; Upgrade mozilla firefox_esr to a higher version than 38.0,38.0.1,38.0.5,38.1.0,and avoid the version 38.0,38.0.1,38.0.5,38.1.0; Upgrade oracle solaris to a higher version than 11.3,and avoid the version 11.3