漏洞信息
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Vulnerability Title
Infinite loop in Alt-Svc header parser in hackney
Vulnerability Description
Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in benoitc hackney allows Excessive Allocation. The Alt-Svc response header parser in src/hackney_altsvc.erl does not guarantee forward progress. When parse_token/2 receives a non-token, non-whitespace, non-comma byte (e.g. !, @, =, ;), it returns the input unchanged. skip_comma/1 also returns the buffer unchanged when the first byte is not a comma. parse_entries/2 then recurses with identical data, creating a tight infinite tail-recursive loop that pins a scheduler at 100% CPU. The calling process never returns.
The entry point parse_and_cache/3 is called synchronously in the connection process on every HTTP response. A single-byte Alt-Svc: ! response header is sufficient to trigger the hang; the header is fully controlled by any HTTP origin the client connects to.
This issue affects hackney: from 2.0.0-beta.1 before 4.0.1.
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Vulnerability Type
不可达退出条件的循环(无限循环)
Vulnerability Title
Hackney 安全漏洞
Vulnerability Description
Hackney是Hackney公司的一个程序库。 Hackney 2.0.0-beta.1至4.0.1之前版本存在安全漏洞,该漏洞源于Alt-Svc响应头解析器无法保证前向进展,可能导致无限循环和CPU耗尽。
CVSS Information
N/A
Vulnerability Type
N/A