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hackeroneMbeccatiH1:1081406
HistoryJan 19, 2021 - 12:51 p.m.

Revive Adserver: Open redirect in ck.php and lg.php

2021-01-1912:51:23
mbeccati
hackerone.com
188

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

5.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

0.006 Low

EPSS

Percentile

75.8%

An opportunity for open redirects has been available by design since the
early versions of Revive Adserver’s predecessors in the impression and
click tracking scripts to allow third party ad servers to track such
metrics when delivering ads. Historically the display advertising
industry has considered that to be a feature, not a real vulnerability.

The lg.php and ck.php delivery scripts are subject to open redirect via
either dest, oadest and/or ct0 parameters.

Impact

Users seeing a trustworthy domain could be redirected to a malicious URL without realising.

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

5.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

0.006 Low

EPSS

Percentile

75.8%

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