CVE-2021-43557
high · 7.5The uri-block plugin in Apache APISIX before 2.10.2 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.
7.5
CVSS
12.9%
EPSS (exploit prob.)
96th
EPSS percentile
2021-11-22
Published
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-77
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| apache | apisix | < 2.10.2 |
Check a specific version with /api/v1/cve/match.
References
- http://www.openwall.com/lists/oss-security/2021/11/22/1
- http://www.openwall.com/lists/oss-security/2021/11/22/2
- http://www.openwall.com/lists/oss-security/2021/11/23/1
- https://lists.apache.org/thread/18jyd458ptocr31rnkjs71w4h366mv7h
- http://www.openwall.com/lists/oss-security/2021/11/22/1
- http://www.openwall.com/lists/oss-security/2021/11/22/2
- http://www.openwall.com/lists/oss-security/2021/11/23/1
- https://lists.apache.org/thread/18jyd458ptocr31rnkjs71w4h366mv7h
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2021-43557