Cisco ASR 5000 20.0.0/21.0.0/21.0.M0.64702 IPv6 Fragmentation resource management
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CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
7.3 | $0-$5k | 0.00 |
A vulnerability, which was classified as critical, has been found in Cisco ASR 5000 20.0.0/21.0.0/21.0.M0.64702 (Router Operating System). This issue affects an unknown functionality of the component IPv6 Fragmentation Handler. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability.
The bug was discovered 12/07/2016. The weakness was published 12/07/2016 with Cisco as cisco-sa-20161207-asr as confirmed advisory (Website). The advisory is shared at tools.cisco.com. The identification of this vulnerability is CVE-2016-6467 since 07/26/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The advisory points out:
The vulnerability is due to lack of proper input validation of the IPv6 fragment lengths. An attacker could exploit this vulnerability by sending a crafted IPv6 fragment chain to the targeted device. An exploit could allow the attacker to cause a denial of service (DoS) condition if the NPU process unexpectedly reloads. The DoS condition could temporarily impact user traffic.
Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.
The vulnerability is also documented in the databases at SecurityFocus (BID 94772†) and SecurityTracker (ID 1037416†). Similar entry is available at VDB-94023.
Product
Type
Vendor
Name
Version
License
Support
- end of life (old version)
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 7.5VulDB Meta Temp Score: 7.3
VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.5
NVD Vector: 🔍
CVSSv2
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
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VulDB Base Score: 🔍
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Exploiting
Class: Resource managementCWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Timeline
07/26/2016 🔍12/07/2016 🔍
12/07/2016 🔍
12/07/2016 🔍
12/07/2016 🔍
12/09/2016 🔍
12/10/2016 🔍
12/13/2016 🔍
10/05/2022 🔍
Sources
Vendor: cisco.comAdvisory: cisco-sa-20161207-asr
Organization: Cisco
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2016-6467 (🔍)
SecurityFocus: 94772 - Cisco ASR 5000 Series Aggregation Services Routers CVE-2016-6467 Denial of Service Vulnerability
SecurityTracker: 1037416
See also: 🔍
Entry
Created: 12/10/2016 18:29Updated: 10/05/2022 13:42
Changes: 12/10/2016 18:29 (59), 06/23/2019 09:35 (13), 10/05/2022 13:42 (3)
Complete: 🔍
Cache ID: 18:C60:103
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