漏洞信息
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Vulnerability Title
Global Buffer Overflow in GNU gzip
Vulnerability Description
GNU gzip contains a global buffer overflow vulnerability in the LZH decompression logic caused by improper reuse of shared global state between different decompression formats within a single execution. GNU gzip maintains a global array that is shared across the LZ77, LZW, and LZH decompression routines and is not reinitialized between files processed in the same invocation. By decompressing a specially crafted LZW file followed by a specially crafted LZH file in a single gzip -d command, an attacker can poison the shared global state and subsequently trigger an out‑of‑bounds read in the LZH decoder. The LZH decompression logic follows stale values left in the shared array, causing reads past the end of the allocated global buffer. This issue has been fixed in the commit 63dbf6b3b9e6e781df1a6a64e609b10e23969681
CVSS Information
N/A
Vulnerability Type
缓冲区上溢读取
Vulnerability Title
GNU gzip 缓冲区错误漏洞
Vulnerability Description
GNU gzip是美国GNU基金会开源的一个文件压缩解压程序。 GNU gzip 1.14及之前版本存在缓冲区错误漏洞,该漏洞源于LZH解压缩逻辑中存在全局缓冲区溢出,由于在同一执行过程中不同解压缩格式之间不当重用共享全局状态,攻击者可以通过在单个gzip -d命令中先解压缩特制的LZW文件再解压缩特制的LZH文件来污染共享全局状态,从而触发LZH解码器中的越界读取。
CVSS Information
N/A
Vulnerability Type
N/A