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zdiT ShiomitsuZDI-21-135
HistoryFeb 04, 2021 - 12:00 a.m.

Cisco Multiple Routers DNIAPI Directory Traversal Arbitrary File Creation Vulnerability

2021-02-0400:00:00
T Shiomitsu
www.zerodayinitiative.com
33

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

9.4 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:C/A:C

0.007 Low

EPSS

Percentile

79.1%

This vulnerability allows network-adjacent attackers to create arbitrary files on affected installations of Cisco RV16x and RV26x routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 443 by default. When parsing the filename parameter, the process does not properly validate a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to create files in the context of root.

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

9.4 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:C/A:C

0.007 Low

EPSS

Percentile

79.1%