CiscoCVE-2022-20679CVE-2022-20679
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
50.4%
A vulnerability in the IPSec decryption routine of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to buffer exhaustion that occurs while traffic on a configured IPsec tunnel is being processed. An attacker could exploit this vulnerability by sending traffic to an affected device that has a maximum transmission unit (MTU) of 1800 bytes or greater. A successful exploit could allow the attacker to cause the device to reload. To exploit this vulnerability, the attacker may need access to the trusted network where the affected device is in order to send specific packets to be processed by the device. All network devices between the attacker and the affected device must support an MTU of 1800 bytes or greater. This access requirement could limit the possibility of a successful exploit.
Affected configurations
| Vendor | Product | Version | CPE |
|---|---|---|---|
| cisco | ios_xe | 3.15.1xbs | cpe:2.3:o:cisco:ios_xe:3.15.1xbs:*:*:*:*:*:*:* |
| cisco | ios_xe | 3.15.2xbs | cpe:2.3:o:cisco:ios_xe:3.15.2xbs:*:*:*:*:*:*:* |
| cisco | ios_xe | 16.8.1 | cpe:2.3:o:cisco:ios_xe:16.8.1:*:*:*:*:*:*:* |
| cisco | ios_xe | 16.8.1a | cpe:2.3:o:cisco:ios_xe:16.8.1a:*:*:*:*:*:*:* |
| cisco | ios_xe | 16.8.1b | cpe:2.3:o:cisco:ios_xe:16.8.1b:*:*:*:*:*:*:* |
| cisco | ios_xe | 16.8.1c | cpe:2.3:o:cisco:ios_xe:16.8.1c:*:*:*:*:*:*:* |
| cisco | ios_xe | 16.8.1d | cpe:2.3:o:cisco:ios_xe:16.8.1d:*:*:*:*:*:*:* |
| cisco | ios_xe | 16.8.1e | cpe:2.3:o:cisco:ios_xe:16.8.1e:*:*:*:*:*:*:* |
| cisco | ios_xe | 16.8.1s | cpe:2.3:o:cisco:ios_xe:16.8.1s:*:*:*:*:*:*:* |
| cisco | ios_xe | 16.8.2 | cpe:2.3:o:cisco:ios_xe:16.8.2:*:*:*:*:*:*:* |
CNA Affected
[
{
"product": "Cisco IOS XE Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
50.4%