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【OLK-5.10】IMA策略路径和摘要列表文件大小缺少校验
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#I409K9
Bug
anakinzhang
Opened this issue
2021-07-12 16:49
<!-- #请根据issue的类型在标题右侧下拉框中选择对应的选项(需求、缺陷或CVE等)--> <!-- #请根据issue相关的版本在里程碑中选择对应的节点,若是与版本无关,请选择“不关联里程碑”--> 【标题描述】IMA策略和摘要列表路径和文件大小缺少校验,可导致日志注入或OOM 【环境信息】 硬件信息:不涉及 软件信息: 1) openEuler 20.09, openEuler 21.03, openEuler master 2) 内核版本5.10 【问题复现步骤】 具体操作步骤 1. 开启IMA(log模式或enforce模式),执行: ```bash echo -e "/\rtest1235341512365123" > /sys/kernel/security/ima/policy ``` 可造成dmesg日志注入,注入内容可以是`/\r`后面的任何字符串。 2. 开启IMA(log模式),执行: ```bash echo [BIG FILE PATH] > /sys/kernel/security/ima/digest_list_data ``` 在内存很少的情况下,向SecurityFS导入一个大文件,可造成OOM。 出现概率:必现 【预期结果】 预期结果:不能注入任意日志 and 对IMA策略文件有大小校验 【实际结果】 可注入任意日志 and 对IMA策略文件大小没有校验 【附件信息】 无
<!-- #请根据issue的类型在标题右侧下拉框中选择对应的选项(需求、缺陷或CVE等)--> <!-- #请根据issue相关的版本在里程碑中选择对应的节点,若是与版本无关,请选择“不关联里程碑”--> 【标题描述】IMA策略和摘要列表路径和文件大小缺少校验,可导致日志注入或OOM 【环境信息】 硬件信息:不涉及 软件信息: 1) openEuler 20.09, openEuler 21.03, openEuler master 2) 内核版本5.10 【问题复现步骤】 具体操作步骤 1. 开启IMA(log模式或enforce模式),执行: ```bash echo -e "/\rtest1235341512365123" > /sys/kernel/security/ima/policy ``` 可造成dmesg日志注入,注入内容可以是`/\r`后面的任何字符串。 2. 开启IMA(log模式),执行: ```bash echo [BIG FILE PATH] > /sys/kernel/security/ima/digest_list_data ``` 在内存很少的情况下,向SecurityFS导入一个大文件,可造成OOM。 出现概率:必现 【预期结果】 预期结果:不能注入任意日志 and 对IMA策略文件有大小校验 【实际结果】 可注入任意日志 and 对IMA策略文件大小没有校验 【附件信息】 无
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