Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2022-20694

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
15/04/2022
Last modified:
07/11/2023

Description

A vulnerability in the implementation of the Resource Public Key Infrastructure (RPKI) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the Border Gateway Protocol (BGP) process to crash, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of a specific RPKI to Router (RTR) Protocol packet header. An attacker could exploit this vulnerability by compromising the RPKI validator server and sending a specifically crafted RTR packet to an affected device. Alternatively, the attacker could use man-in-the-middle techniques to impersonate the RPKI validator server and send a crafted RTR response packet over the established RTR TCP connection to the affected device. A successful exploit could allow the attacker to cause a DoS condition because the BGP process could constantly restart and BGP routing could become unstable.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.80 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
6.80
Severity 3.x
MEDIUM
Vector 2.0
AV:N/AC:M/Au:N/C:N/I:N/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete

Base Score 2.0
7.10
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios_xe:3.7.0bs:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.0xas:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.0xbs:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.1as:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.2ts:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.3s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.4as:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.4s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.5s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.6s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.7s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.8s:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools