Bash是一款在很多Unix电脑中用于控制命令提示符的软件,黑客可以借助Bash中的漏洞完全控制目标系统。
美国国土安全部下属的美国电脑紧急响应团队(以下简称“US-CERT”)发出警告称,这一漏洞可能影响基于Unix的操作系统,包括Linux和Mac OS X
漏洞详情页面:http://seclists.org/oss-sec/2014/q3/650
漏洞级别:非常严重
redhat官方提供漏洞详情
A flaw was found in the way Bash evaluated certain specially crafted environment variables. An attacker could use this flaw to override or bypass environment restrictions to execute shell commands. Certain services and applications allow remote unauthenticated attackers to provide environment variables, allowing them to exploit this issue.
redhat官方提供检测方式
运行命令:
env x='() { :;}; echo vulnerable' bash -c "echo this is a test"
如果返回以下内容:则请尽快升级。
vulnerable
this is a test
目前官方已经提供了升级包请运行:yum update -y bash 进行升级处理!
RedHat, CentOS or Fedora bash版本将升级到bash-4.1.2-15.el6_5.1.x86_64
(转自51CTO.COM)