Date: Mon, 22 Nov 2021 07:57:25 +0100 From: Marcin Niemiec <niemiec.marcin@...il.com> To: Zexuan Luo <spacewander@...che.org> Cc: announce@...che.org, dev@...six.apache.org, Apache Security Team <security@...che.org>, oss-security@...ts.openwall.com Subject: Re: CVE-2021-43557: Apache APISIX: Path traversal in request_uri variable Hi, Looks good to me. It's really awesome that you verified this issue and provided fix so quickly! Best, Marcin pon., 22 lis 2021 o 07:30 Zexuan Luo <spacewander@...che.org> napisał(a): > Severity: moderate > > Description: > > The uri-block plugin in APISIX uses $request_uri without verification. > The $request_uri is the full original request URI without > normalization. > This makes it possible to construct a URI to bypass the block list on > some occasions. For instance, when the block list contains > "^/internal/", a URI like `//internal/` can be used to bypass it. > > Some other plugins also have the same issue. And it may affect the > developer's custom plugin. > > This issue is fixed in APISIX 2.10.2. > Thanks to Marcin Niemiec for reporting the vulnerability. > > Mitigation: > > 1. Upgrade to APISIX 2.10.2 > 2. Carefully review custom code, find & fix the usage of $request_uri > without verification. >
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