CVE:CVE-2011-1769
CNNVD:CNNVD-201105-246
SystemTap是一套Linux内核诊断工具。该工具允许从运行的Linux内核快速和安全的获取信息。
当无特权（又称stapusr）模式启用时，SystemTap 1.4及之前版本在处理某些特制的DWARF信息时存在拒绝服务漏洞，runtime/unwind.c的“compute_expr()”函数中存在的零除错误导致产生此漏洞，本地用户可借助带有DWARF表达式（没有被stap脚本正确处理）的特制ELF程序导致拒绝服务（零除错误和OOPS），该脚本执行环境变量访问。
solution:Upgrade systemtap systemtap to a higher version than 1.4,0.2.2,0.3,0.4,0.5,0.5.3,0.5.4,0.5.5,0.5.7,0.5.8,0.5.9,0.5.10,0.5.12,0.5.13,0.5.14,0.6,0.6.2,0.7,0.7.2,0.8,0.9,0.9.5,0.9.7,0.9.8,0.9.9,1.0,1.1,1.2,1.3,and avoid the version (,1.4],0.2.2,0.3,0.4,0.5,0.5.3,0.5.4,0.5.5,0.5.7,0.5.8,0.5.9,0.5.10,0.5.12,0.5.13,0.5.14,0.6,0.6.2,0.7,0.7.2,0.8,0.9,0.9.5,0.9.7,0.9.8,0.9.9,1.0,1.1,1.2,1.3