VDB-101555 · CVE-2017-6641 · BID 98532

Cisco Remote Expert Manager 11.0.0 TCP Connection resource management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Cisco Remote Expert Manager 11.0.0. This vulnerability affects unknown code of the component TCP Connection Handler. The manipulation as part of TCP Connection leads to resource management. This vulnerability is referenced as CVE-2017-6641. Remote exploitation of the attack is possible. No exploit is available. It is recommended to apply restrictive firewalling.

Detailsinfo

A vulnerability was found in Cisco Remote Expert Manager 11.0.0. It has been rated as problematic. This issue affects some unknown processing of the component TCP Connection Handler. The manipulation as part of a TCP Connection leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. The summary by CVE is:

A vulnerability in the TCP connection handling functionality of Cisco Remote Expert Manager Software 11.0.0 could allow an unauthenticated, remote attacker to disable TCP ports and cause a denial of service (DoS) condition on an affected system. The vulnerability is due to a lack of rate-limiting functionality in the TCP Listen application of the affected software. An attacker could exploit this vulnerability by sending a crafted TCP traffic stream in which specific types of TCP packets are flooded to an affected device, for example a TCP packet stream in which the TCP FIN bit is set in all the TCP packets. A successful exploit could allow the attacker to cause certain TCP listening ports on the affected system to stop accepting incoming connections for a period of time or until the affected device is restarted, resulting in a DoS condition. In addition, system resources, such as CPU and memory, could be exhausted during the attack. Cisco Bug IDs: CSCva29806.

The bug was discovered 05/17/2017. The weakness was published 05/22/2017 as cisco-sa-20170517-rem1 as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2017-6641 since 03/09/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $5k-$25k.

Addressing this vulnerability is possible by firewalling .

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 98532†). Similar entries are available at VDB-101559, VDB-101558, VDB-101557 and VDB-101556. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
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: Firewall
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/09/2017 🔍
05/17/2017 +69 days 🔍
05/17/2017 +0 days 🔍
05/21/2017 +4 days 🔍
05/22/2017 +1 days 🔍
05/22/2017 +0 days 🔍
05/22/2017 +0 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20170517-rem1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-6641 (🔍)
GCVE (CVE): GCVE-0-2017-6641
GCVE (VulDB): GCVE-100-101555
SecurityFocus: 98532 - Cisco Remote Expert Manager Software CVE-2017-6641 Denial of Service Vulnerability
OSVDB: - CVE-2017-6641 - Cisco - Remote Expert Manager - High

See also: 🔍

Entryinfo

Created: 05/22/2017 11:15
Changes: 05/22/2017 11:15 (68)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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