CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS
Percentile
37.0%
authority-regex
allows an attacker to send malicious URLs to be parsed by the lambdaisland/uri
and return the wrong authority. This issue is similar to CVE-2020-8910.
This regex doesn’t handle the backslash (\
) character in the username correctly, leading to a wrong output.
Payload: https://example.com\\@google.com
The returned host is google.com
, but the correct host should be example.com
.
urllib3
(Python) and google-closure-library
(Javascript) return example.com
as the host. Here the correct (or current) regex used by google-closure-library
:
(ns poc.core)
(require '[lambdaisland.uri :refer (uri)])
(def myurl "https://example.com\\@google.com")
(defn -main
[]
(println myurl)
(println (:host (uri myurl)))
)
The library returns the wrong authority, and it can be abused to bypass host restrictions.
WHATWG Living URL spec, section 4.4 URL Parsing, host state: https://url.spec.whatwg.org/#url-parsing
github.com/google/closure-library/blob/0e567abedb058e9b194a40cfa3ad4c507653bccf/closure/goog/uri/utils.js#L189
github.com/lambdaisland/uri
github.com/lambdaisland/uri/blob/d3355fcd3e235238f4dcd37be97787a84e580072/src/lambdaisland/uri.cljc#L9
github.com/lambdaisland/uri/commit/f46db3e84846f79e14bfee0101d9c7a872321820
github.com/lambdaisland/uri/releases/tag/v1.14.120
github.com/lambdaisland/uri/security/advisories/GHSA-cp4w-6x4w-v2h5
nvd.nist.gov/vuln/detail/CVE-2023-28628
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS
Percentile
37.0%