VDB-105415 · CVE-2017-6774 · BID 100386

Cisco StarOS 21.0.v0.65839 on ASR 5000 FTP Subdirectory access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Cisco StarOS 21.0.v0.65839 on ASR 5000. This affects an unknown part of the component FTP Subdirectory Handler. This manipulation causes access control. This vulnerability is registered as CVE-2017-6774. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco StarOS 21.0.v0.65839 on ASR 5000 (Router Operating System). It has been declared as critical. Affected by this vulnerability is some unknown functionality of the component FTP Subdirectory Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect integrity, and availability. The summary by CVE is:

A vulnerability in Cisco ASR 5000 Series Aggregated Services Routers running the Cisco StarOS operating system could allow an authenticated, remote attacker to overwrite or modify sensitive system files. The vulnerability is due to the inclusion of sensitive system files within specific FTP subdirectories. An attacker could exploit this vulnerability by overwriting sensitive configuration files through FTP. An exploit could allow the attacker to overwrite configuration files on an affected system. Cisco Bug IDs: CSCvd47739. Known Affected Releases: 21.0.v0.65839.

The bug was discovered 08/16/2017. The weakness was published 08/17/2017 with Cisco as cisco-sa-20170816-staros2 as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is known as CVE-2017-6774 since 03/09/2017. The attack can be launched remotely. A single authentication is required for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 100386†). Similar entries are available at VDB-105416 and VDB-105414. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.0
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/09/2017 🔍
08/16/2017 +160 days 🔍
08/16/2017 +0 days 🔍
08/17/2017 +1 days 🔍
08/17/2017 +0 days 🔍
08/18/2017 +1 days 🔍
01/09/2021 +1240 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20170816-staros2
Researcher: Cisco.
Organization: Cisco
Status: Confirmed

CVE: CVE-2017-6774 (🔍)
GCVE (CVE): GCVE-0-2017-6774
GCVE (VulDB): GCVE-100-105415
SecurityFocus: 100386 - Cisco StarOS for ASR 5000 Series Routers CVE-2017-6774 Arbitrary File Write Vulnerability
SecurityTracker: 1039182

See also: 🔍

Entryinfo

Created: 08/18/2017 08:45
Updated: 01/09/2021 15:07
Changes: 08/18/2017 08:45 (65), 11/07/2019 17:49 (4), 01/09/2021 15:01 (2), 01/09/2021 15:07 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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