CVE-2020-3397
Cisco NX-OS Software Border Gateway Protocol (BGP) Multicast VPN (MVPN) Denial of Service (DoS) Vulnerability
Description
A vulnerability in the Border Gateway Protocol (BGP) Multicast VPN (MVPN) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause an affected device to unexpectedly reload, resulting in a denial of service (DoS) condition. The vulnerability is due to incomplete input validation of a specific type of BGP MVPN update message. An attacker could exploit this vulnerability by sending this specific, valid BGP MVPN update message to a targeted device. A successful exploit could allow the attacker to cause one of the BGP-related routing applications to restart multiple times, leading to a system-level restart. Note: The Cisco implementation of BGP accepts incoming BGP traffic from only explicitly configured peers. To exploit this vulnerability, an attacker must send a specific BGP MVPN update message over an established TCP connection that appears to come from a trusted BGP peer. To do so, the attacker must obtain information about the BGP peers in the trusted network of the affected system.
INFO
Published Date :
Aug. 27, 2020, 4:15 p.m.
Last Modified :
Aug. 6, 2021, 6:58 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-3397
.
URL | Resource |
---|---|
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxosbgp-nlri-dos-458rG2OQ | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-3397
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-3397
vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Aug. 06, 2021
Action Type Old Value New Value -
Initial Analysis by [email protected]
Sep. 03, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:N/A:C) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxosbgp-nlri-dos-458rG2OQ No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxosbgp-nlri-dos-458rG2OQ Vendor Advisory Added CWE NIST CWE-20 Added CPE Configuration AND OR *cpe:2.3:o:cisco:nx-os:-:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:nexus_3016:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3048:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3064:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3064-t:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_31108pc-v:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_31108tc-v:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_31128pq:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3132c-z:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3132q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3132q-v:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3132q-xl:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3164q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3172:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3172pq-xl:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3172tq:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3172tq-32t:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3172tq-xl:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3232c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3264c-e:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3264q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3408-s:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_34180yc:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3432d-s:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3464c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3524:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3524-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3524-xl:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3548:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3548-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3548-xl:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_36180yc-r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3636c-r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_92160yc-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_92300yc:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_92304qc:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_92348gc-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9236c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9272q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93108tc-ex:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93108tc-fx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93120tx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93128tx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93180lc-ex:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93180yc-ex:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93180yc-fx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93216tc-fx2:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93240yc-fx2:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9332c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9332pq:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93360yc-fx2:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9336c-fx2:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9336pq_aci_spine:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9348gc-fxp:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9364c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9372px:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9372px-e:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9372tx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9372tx-e:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9396px:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9396tx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9504:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9508:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9516:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-3397
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-3397
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.16 }} 0.02%
score
0.51237
percentile