CVE-2022-20694 - Reachable Assertion

Severity

68%

Complexity

22%

Confidentiality

66%

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.

CVSS 3.1 Base Score 6.8. CVSS Attack Vector: network. CVSS Attack Complexity: high. CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H).

CVSS 2.0 Base Score 7.1. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:C).

Demo Examples

Reachable Assertion

CWE-617

In the excerpt below, an AssertionError (an unchecked exception) is thrown if the user hasn't entered an email address in an HTML form.


               
assert email != null;

Overview

Type

Cisco IOS

First reported 2 years ago

2022-04-15 15:15:00

Last updated 2 years ago

2022-04-27 03:52:00

Affected Software

Cisco IOS XE 3.7.0BS

3.7.0bs

Cisco IOS XE 3.7.0s

3.7.0s

Cisco IOS XE 3.7.1s

3.7.1s

Cisco IOS XE 3.7.2s

3.7.2s

Cisco IOS XE 3.7.4AS

3.7.4as

Cisco IOS XE 3.7.8S

3.7.8s

Cisco IOS XE 3.8.0s

3.8.0s

Cisco IOS XE 3.8.1S

3.8.1s

Cisco IOS XE 3.8.2S

3.8.2s

Cisco IOS XE 3.9.0AS

3.9.0as

Cisco IOS XE 3.9.0s

3.9.0s

Cisco IOS XE 3.9.1AS

3.9.1as

Cisco IOS XE 3.9.1s

3.9.1s

Cisco IOS XE 3.9.2S

3.9.2s

Cisco IOS XE 3.10.0S

3.10.0s

Cisco IOS XE 3.10.1S

3.10.1s

Cisco IOS XE 3.10.1XBS

3.10.1xbs

Cisco IOS XE 3.10.2AS

3.10.2as

Cisco IOS XE 3.10.2S

3.10.2s

Cisco IOS XE 3.10.3S

3.10.3s

Cisco IOS XE 3.10.5S

3.10.5s

Cisco IOS XE 3.10.6S

3.10.6s

Cisco IOS XE 3.10.7S

3.10.7s

Cisco IOS XE 3.10.10S

3.10.10s

Cisco IOS XE 3.11.0S

3.11.0s

Cisco IOS XE 3.11.1S

3.11.1s

Cisco IOS XE 3.11.2S

3.11.2s

Cisco IOS XE 3.12.0AS

3.12.0as

Cisco IOS XE 3.13.3S

3.13.3s

Cisco IOS XE 3.13.6BS

3.13.6bs

Cisco IOS XE 3.13.10S

3.13.10s

Cisco IOS XE 3.14.0S

3.14.0s

Cisco IOS XE 3.14.1S

3.14.1s

Cisco IOS XE 3.14.2S

3.14.2s

Cisco IOS XE 3.14.3S

3.14.3s

Cisco IOS XE 3.14.4S

3.14.4s

Cisco IOS XE 3.15.1cS

3.15.1cs

Cisco IOS XE 3.15.4S

3.15.4s

Cisco IOS XE 3.16.0AS

3.16.0as

Cisco IOS XE 3.16.0BS

3.16.0bs

Cisco IOS XE 3.16.0cS

3.16.0cs

Cisco IOS XE 3.16.1AS

3.16.1as

Cisco IOS XE 3.16.1S

3.16.1s

Cisco IOS XE 3.16.2BS

3.16.2bs

Cisco IOS XE 3.16.4CS

3.16.4cs

Cisco IOS XE 3.16.4ES

3.16.4es

Cisco IOS XE 3.16.4GS

3.16.4gs

Cisco IOS XE 3.16.5AS

3.16.5as

Cisco IOS XE 3.16.5BS

3.16.5bs

Cisco IOS XE 3.16.7AS

3.16.7as

Cisco IOS XE 3.16.7BS

3.16.7bs

Cisco IOS XE 3.16.8S

3.16.8s

Cisco IOS XE 3.16.9S

3.16.9s

Cisco IOS XE 3.16.10S

3.16.10s

Cisco IOS XE 3.17.1AS

3.17.1as

Cisco IOS XE 3.17.2S

3.17.2s

Cisco IOS XE 3.18.0AS

3.18.0as

Cisco IOS XE 3.18.0S

3.18.0s

Cisco IOS XE 3.18.1GSP

3.18.1gsp

Cisco IOS XE 3.18.1HSP

3.18.1hsp

Cisco IOS XE 3.18.1ISP

3.18.1isp

Cisco IOS XE 3.18.3ASP

3.18.3asp

Cisco IOS XE 3.18.3BSP

3.18.3bsp

Cisco IOS XE 3.18.4S

3.18.4s

Cisco IOS XE 3.18.4SP

3.18.4sp

Cisco IOS XE 3.18.5SP

3.18.5sp

Cisco IOS XE 3.18.6SP

3.18.6sp

Cisco IOS XE 3.18.7SP

3.18.7sp

Cisco IOS XE 3.18.8SP

3.18.8sp

Cisco IOS XE 16.1.1

16.1.1

Cisco IOS XE 16.3.4

16.3.4

Cisco IOS XE 16.3.5

16.3.5

Cisco IOS XE 16.3.7

16.3.7

Cisco IOS XE 16.3.8

16.3.8

Cisco IOS XE 16.4.2

16.4.2

Cisco IOS XE 16.4.3

16.4.3

Cisco IOS XE 16.5.1

16.5.1

Cisco IOS XE 16.5.1B

16.5.1b

Cisco IOS XE 16.5.2

16.5.2

Cisco IOS XE 16.5.3

16.5.3

Cisco IOS XE 16.6.4

16.6.4

Cisco IOS XE 16.6.4A

16.6.4a

Cisco IOS XE 16.6.4S

16.6.4s

Cisco IOS XE 16.6.5A

16.6.5a

Cisco IOS XE 16.6.5B

16.6.5b

Cisco IOS XE 16.6.6

16.6.6

Cisco IOS XE 16.6.7A

16.6.7a

Cisco IOS XE 16.6.8

16.6.8

Cisco IOS XE 16.7.1A

16.7.1a

Cisco IOS XE 16.7.1B

16.7.1b

Cisco IOS XE 16.7.3

16.7.3

Cisco IOS XE 16.7.4

16.7.4

Cisco IOS XE 16.8.1A

16.8.1a

Cisco IOS XE 16.8.1B

16.8.1b

Cisco IOS XE 16.8.1C

16.8.1c

Cisco IOS XE 16.8.1D

16.8.1d

Cisco IOS XE 16.8.1E

16.8.1e

Cisco IOS XE 16.8.1S

16.8.1s

Cisco IOS XE 16.8.2

16.8.2

Cisco IOS XE 16.8.3

16.8.3

Cisco IOS XE16.9.1

16.9.1

Cisco IOS XE 16.9.1A

16.9.1a

Cisco IOS XE 16.9.1B

16.9.1b

Cisco IOS XE 16.9.1C

16.9.1c

Cisco IOS XE 16.9.1D

16.9.1d

Cisco IOS XE 16.9.1S

16.9.1s

Cisco IOS XE 16.9.2

16.9.2

Cisco IOS XE 16.9.2A

16.9.2a

Cisco IOS XE 16.9.2S

16.9.2s

Cisco IOS XE 16.9.3

16.9.3

Cisco IOS XE 16.9.3A

16.9.3a

Cisco IOS XE 16.9.3H

16.9.3h

Cisco IOS XE 16.9.3S

16.9.3s

Cisco IOS XE 16.9.4C

16.9.4c

Cisco IOS XE 16.9.5

16.9.5

Cisco IOS XE 16.9.5F

16.9.5f

Cisco IOS XE 16.10.1

16.10.1

Cisco IOS XE 16.10.1A

16.10.1a

Cisco IOS XE 16.10.1B

16.10.1b

Cisco IOS XE 16.10.1C

16.10.1c

Cisco IOS XE 16.10.1D

16.10.1d

Cisco IOS XE 16.10.1E

16.10.1e

Cisco IOS XE 16.10.1F

16.10.1f

Cisco IOS XE 16.10.1G

16.10.1g

Cisco IOS XE 16.10.1S

16.10.1s

Cisco IOS XE 16.10.2

16.10.2

Cisco IOS XE 16.10.3

16.10.3

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