漏洞信息
# snappy-java的未检查数据块长度导致DoS
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漏洞标题
snappy-java's unchecked chunk length leads to DoS
漏洞描述信息
snappy-java is a fast compressor/decompressor for Java. Due to use of an unchecked chunk length, an unrecoverable fatal error can occur in versions prior to 1.1.10.1.
The code in the function hasNextChunk in the fileSnappyInputStream.java checks if a given stream has more chunks to read. It does that by attempting to read 4 bytes. If it wasn’t possible to read the 4 bytes, the function returns false. Otherwise, if 4 bytes were available, the code treats them as the length of the next chunk.
In the case that the `compressed` variable is null, a byte array is allocated with the size given by the input data. Since the code doesn’t test the legality of the `chunkSize` variable, it is possible to pass a negative number (such as 0xFFFFFFFF which is -1), which will cause the code to raise a `java.lang.NegativeArraySizeException` exception. A worse case would happen when passing a huge positive value (such as 0x7FFFFFFF), which would raise the fatal `java.lang.OutOfMemoryError` error.
Version 1.1.10.1 contains a patch for this issue.
CVSS信息
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
漏洞类别
不加限制或调节的资源分配
漏洞标题
Snappy 输入验证错误漏洞
漏洞描述信息
Snappy是KNP Labs个人开发者的一个 PHP 库，允许从 url 或 html 页面生成缩略图、快照或 PDF。 Snappy snappy-java 1.1.10.1 之前版本存在输入验证错误漏洞，该漏洞源于未检查的乘法运算，可能会发生整数溢出，从而导致致命错误。
CVSS信息
N/A
漏洞类别
输入验证错误