Cisco ONS 15454 up to 9.6.0 Transport Node Controller Traffic Saturation input validation

CVSS Meta Temp Score
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6.7$0-$5k0.00

A vulnerability was found in Cisco ONS 15454 up to 9.6.0 and classified as critical. Affected by this issue is an unknown code block of the component Transport Node Controller. The manipulation with an unknown input leads to a input validation vulnerability (Traffic Saturation). Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. CVE summarizes:

The tNetTaskLimit process on the Transport Node Controller (TNC) on Cisco ONS 15454 devices with software 9.6 and earlier does not properly prioritize health pings, which allows remote attackers to cause a denial of service (watchdog timeout and TNC reset) via a flood of network traffic, aka Bug ID CSCud97155.

The weakness was shared 12/17/2013 as CSCud97155 as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability is handled as CVE-2013-6701 since 11/07/2013. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available. The advisory points out:

An issue in the tNetTaskLimit process of the Cisco ONS 15454 Transport Node Controller (TNC) could allow an unauthenticated, remote attacker to cause the TNC to reload due to a watchdog timeout. The issue is due to a packet processing services process missing health pings due to excessive traffic sent to the TNC during stability security testing and the TNC reset due to a watchdog timeout. An attacker could exploit this issue by sending high rates of data traffic to the TNC. An exploit could allow the attacker to trigger a reload of the TNC.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The advisory illustrates:

To exploit this vulnerability, it is likely that an attacker would need access to trusted, internal networks where the targeted device resides to send high rates of data traffic to the device. This access requirement may reduce the likelihood of a successful exploit.

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (89831). tools.cisco.com is providing further details.

Productinfo

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Support

  • end of life (old version)

CPE 2.3info

CPE 2.2info

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CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Name: Traffic Saturation
Class: Input validation / Traffic Saturation
CWE: CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

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Current Price Estimation: 🔍

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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Timelineinfo

11/07/2013 🔍
12/17/2013 +39 days 🔍
12/17/2013 +0 days 🔍
12/17/2013 +0 days 🔍
12/17/2013 +0 days 🔍
12/17/2013 +0 days 🔍
12/18/2013 +1 days 🔍
12/18/2013 +0 days 🔍
12/25/2013 +7 days 🔍
06/04/2021 +2718 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCud97155
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-6701 (🔍)
X-Force: 89831
SecurityTracker: 1029512
Vulnerability Center: 42720 - Cisco ONS Remote DoS Vulnerability in Transport Node Controller via Network Traffic Flood, Medium
SecurityFocus: 64397
OSVDB: 101106

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍

Entryinfo

Created: 12/18/2013 16:12
Updated: 06/04/2021 13:10
Changes: 12/18/2013 16:12 (52), 05/18/2017 17:26 (16), 06/04/2021 13:02 (3), 06/04/2021 13:10 (2)
Complete: 🔍

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