Cisco IOS XR Border Gateway Protocol TCP Connection resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

A vulnerability was found in Cisco IOS XR (Router Operating System) (version now known) and classified as problematic. This issue affects some unknown processing of the component Border Gateway Protocol. 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 implementation of Border Gateway Protocol (BGP) Ethernet VPN (EVPN) functionality in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of a BGP update message that contains crafted EVPN attributes. An attacker could indirectly exploit the vulnerability by sending BGP EVPN update messages with a specific, malformed attribute to an affected system and waiting for a user on the device to display the EVPN operational routes’ status. If successful, the attacker could cause the BGP process to restart unexpectedly, resulting in a DoS condition. The Cisco implementation of BGP accepts incoming BGP traffic only from explicitly defined peers. To exploit this vulnerability, the malicious BGP update message would need to come from a configured, valid BGP peer, or would need to be injected by the attacker into the victim's BGP network on an existing, valid TCP connection to a BGP peer.

The weakness was released 01/26/2020 as cisco-sa-20200122-ios-xr-route as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2019-16018 since 09/06/2019. 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.

Upgrading eliminates this vulnerability.

Entries connected to this vulnerability are available at 149353 and 149352.

Productinfo

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Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.4
NVD Vector: 🔍

CNA Base Score: 7.4
CNA Vector (Cisco Systems, Inc.): 🔍

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
ATT&CK: Unknown

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

09/06/2019 🔍
01/26/2020 +142 days 🔍
01/26/2020 +0 days 🔍
03/26/2024 +1521 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20200122-ios-xr-route
Status: Confirmed

CVE: CVE-2019-16018 (🔍)
scip Labs: https://www.scip.ch/en/?labs.20150108
See also: 🔍

Entryinfo

Created: 01/26/2020 12:48
Updated: 03/26/2024 09:40
Changes: 01/26/2020 12:48 (41), 01/26/2020 12:53 (12), 03/26/2024 09:40 (34)
Complete: 🔍

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