漏洞信息
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Vulnerability Title
Arbitrary Output Location Change in GNU Bison
Vulnerability Description
GNU Bison improperly handles grammar‑defined output paths. Grammar directives such as %output and %header allow specifying file paths, which are accepted without restriction and override caller‑supplied output options. When processing attacker-supplied grammar, this behavior allows directing generated files to arbitrary writable locations on the filesystem, potentially overwriting existing files accessible to the Bison process. Maintainers of this project were notified about this vulnerability, and fixed the issue in commit 8d101c19d4d9aaedf83a448c925513742d4efcf0. However, they did not provide vulnerable version range. Version 3.8.2 was tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
Vulnerability Type
文件名或路径的外部可控制
Vulnerability Title
GNU Bison 输入验证错误漏洞
Vulnerability Description
GNU bison是美国GNU基金会开源的一种通用语法分析器生成工具。 GNU Bison 3.8.2版本存在输入验证错误漏洞,该漏洞源于对语法定义的输出路径处理不当,%output和%header等语法指令允许指定文件路径且未加限制,导致生成的文件可以被写入任意可写位置,可能覆盖现有文件。
CVSS Information
N/A
Vulnerability Type
N/A