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RubySecRUBY:EASYMON-2018-1000855

HistoryNov 08, 2018 - 9:00 p.m.

Reflected XSS in Firefox in check endpoint

2018-11-0821:00:00

RubySec

github.com

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

CVSS3

6.1

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

EPSS

0.001

Percentile

30.1%

JSON

When passing an invalid check name as parameter to the endpoint where
the easymon routes are mounted, a 406 response with a body that contains the invalid
check name unescaped is returned. Malicious JavaScript can be injected into that
invalid name and have it executed in Firefox

Affected configurations

Vulners

Node

rubyeasymonRange≤1.4.1

VendorProductVersionCPE
rubyeasymon*cpe:2.3:a:ruby:easymon:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
ruby	easymon	*	cpe:2.3:a:ruby:easymon::::::::

References

github.com/basecamp/easymon/issues/26

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

CVSS3

6.1

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

EPSS

0.001

Percentile

30.1%

JSON

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