漏洞信息
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Vulnerability Title
Relative path traversal in zip:unzip/zip:extract via check_dir_level depth-counter bypass
Vulnerability Description
Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive. zip:unzip/1,2 and zip:extract/1,2 validate entry paths using zip:check_dir_level/2, which tracks directory depth as a running integer counter: .. decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as ../x/y causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via add_cwd. This vulnerability is associated with program file lib/stdlib/src/zip.erl. This issue affects OTP from OTP 27.1 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15, corresponding to stdlib from 6.1 before 8.0.3, 7.3.0.1 and 6.2.2.4.
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L
Vulnerability Type
相对路径遍历
Vulnerability Title
Erlang OTP 路径遍历漏洞
Vulnerability Description
Erlang OTP是瑞典Erlang社区的一套构建分布式系统的中间件平台。 Erlang OTP 27.1版本和6.1版本存在路径遍历漏洞,该漏洞源于stdlib zip模块中的相对路径遍历问题,允许通过特制zip归档文件将文件写入预期解压目录之外。
CVSS Information
N/A
Vulnerability Type
N/A