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srcinciteSteven Seeley (mr_me) of Source InciteSRC-2020-0013
HistoryJan 08, 2020 - 12:00 a.m.

SRC-2020-0013 : Cisco UCS Director MyCallable call Directory Traversal Remote Code Execution Vulnerability

2020-01-0800:00:00
Steven Seeley (mr_me) of Source Incite
srcincite.io
14

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.103 Low

EPSS

Percentile

94.9%

Vulnerability Details:

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Cisco UCS Director and Cisco UCS Director Express for Big Data. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.

The specific flaw exists within the MyCallable class. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of the tomcatu account.

Affected Vendors:

Cisco

Affected Products:

Cisco UCS Director and Cisco UCS Director Express for Big Data

Vendor Response:

Cisco has issued an update to correct this vulnerability. More details can be found at:
<https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucsd-mult-vulns-UNfpdW4E&gt;

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.103 Low

EPSS

Percentile

94.9%