Apache Hive: Timing Attack Against Signature in LLAP util

Use of Arrays.equals() in LlapSignerImpl in Apache Hive to compare message signatures allows attacker to forge a valid signature for an arbitrary message byte by byte. The attacker should be an authorized user of the product to perform this attack. Users are recommended to upgrade to version 4.0.0, which fixes this issue. The problem occurs when an application doesn’t use a constant-time algorithm for validating a signature. The method Arrays.equals() returns false right away when it sees that one of the input’s bytes are different. It means that the comparison time depends on the contents of the arrays. This little thing may allow an attacker to forge a valid signature for an arbitrary message byte by byte. So it might allow malicious users to submit splits/work with selected signatures to LLAP without running as a privileged user, potentially leading to DDoS attack. More details in the reference section.

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通过时间差异性导致的信息暴露

Apache Hive 安全漏洞

Apache Hive是美国阿帕奇（Apache）基金会的一套基于Hadoop（分布式系统基础架构）的数据仓库软件。该软件提供了一个数据集成方法和一种高级的查询语言，以支持在Hadoop上进行大规模数据分析。 Apache Hive存在安全漏洞，该漏洞源于使用Arrays.equals方法比较消息签名时未采用恒定时间算法，可能导致攻击者逐字节伪造有效签名。

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