Malcolm Vulnerable to Authorization Bypass via URI Normalization Differential in Nginx Lua RBAC
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| cisagov | Malcolm | unaffected |
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| Vendor | Product | Versions | ||||||||
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| Cisagov | Malcolm |
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Vendor Solution
Malcolm version 26.07.0 addresses these issues. For more information, see https://github.com/cisagov/Malcolm/pull/1043
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.369% probability within 30 days)
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cvssV4_0
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| First Time appeared |
Cisagov
Cisagov malcolm |
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Cisagov
Cisagov malcolm |
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ssvc
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| Description | Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, role-based access control enforced in the Nginx OpenResty Lua layer evaluates the raw, unnormalized `ngx.var.request_uri`, while Nginx itself routes requests using the normalized path. An authenticated low-privilege user can prepend a traversal segment (for example `/x/../upload/...`) so that Nginx routes the request to a restricted backend while the Lua role check fails to match any rule and falls open, granting access it should deny. Version 26.07.0 fixes the issue. | |
| Title | Malcolm Vulnerable to Authorization Bypass via URI Normalization Differential in Nginx Lua RBAC | |
| Weaknesses | CWE-863 | |
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| Metrics |
cvssV3_1
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