Revive Adserver 5.0.4 Security Bypass / Open Redirect

2020.03.14
Risk: Medium
Local: No
Remote: Yes
CVE: N/A

======================================================================== Revive Adserver Security Advisory REVIVE-SA-2020-002 ------------------------------------------------------------------------ https://www.revive-adserver.com/security/revive-sa-2020-002 ------------------------------------------------------------------------ CVE-IDs: t.b.a. Date: 2020-03-12 Risk Level: Low Applications affected: Revive Adserver Versions affected: <= 5.0.4 Versions not affected: >= 5.0.5 Website: https://www.revive-adserver.com/ ======================================================================== ======================================================================== Vulnerability 1 - Security restriction bypass ======================================================================== Vulnerability Type: Incorrect Authorization [CWE-863] CVE-ID: t.b.a. CVSS Base Score: 5.6 CVSSv3.1 Vector: AV:P/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N CVSS Impact Subscore: 5.2 CVSS Exploitability Subscore: 0.4 ======================================================================== Description ----------- A security restriction bypass vulnerability has been discovered by HackerOne user hoangn144. Revive Adserver, like many other applications, requires the logged in user to type the current password in order to change the e-mail address or the password. It was however possible for anyone with access to a Revive Adserver admin user interface to bypass such check and change e-email address or password of the currently logged in user by altering the form payload. Details ------- The attack requires physical access to the user interface of a logged in user. If the POST payload was altered by turning the "pwold" parameter into an array, Revive Adserver would fetch and authorise the operation even if no password was provided. References ---------- https://hackerone.com/reports/792895 https://github.com/revive-adserver/revive-adserver/commit/e2a519c3 https://cwe.mitre.org/data/definitions/863.html ======================================================================== Vulnerability 2 - Open Redirect ======================================================================== Vulnerability Type: URL Redirection to Untrusted Site ('Open Redirect') [CWE-601] CVE-ID: t.b.a. CVSS Base Score: 4.2 CVSSv3.1 Vector: AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N CVSS Impact Subscore: 2.5 CVSS Exploitability Subscore: 1.6 ======================================================================== Description ----------- An Open Redirect vulnerability was discovered and reported by HackerOne user hoangn144. A remote attacker could trick logged-in users to open a specifically crafted link and have them redirected to any destination. Details ------- The CSRF protection of the "/www/admin/*-modify.php" could be skipped if no meaningful parameter was sent. No action was performed, but the user was still redirected to the target page, specified via the "returnurl" GET parameter. References ---------- https://hackerone.com/reports/794144 https://github.com/revive-adserver/revive-adserver/commit/05fcd364 https://cwe.mitre.org/data/definitions/601.html ======================================================================== Solution ======================================================================== We strongly advise people to upgrade to the most recent 5.0.5 version of Revive Adserver. ======================================================================== Contact Information ======================================================================== The security contact for Revive Adserver can be reached at: <security AT revive-adserver DOT com>. Please review https://www.revive-adserver.com/security/ before doing so. -- Matteo Beccati On behalf of the Revive Adserver Team https://www.revive-adserver.com/


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